humans travel to mars

Mars Exploration

For over 60 years, NASA has been in pursuit of answering science's biggest questions – was, or is , Mars a habitable world? 

Mars Exploration Science Goals

The key to understanding the past, present or future potential for life on Mars can be found in NASA’s four broad, overarching goals for Mars exploration.

Mars is the only planet we know of inhabited entirely by robots.

From Robots to Humans

Recorded observations of Mars date back more than 4,000 years. Led by our curiosity of the cosmos, NASA has sent a carefully selected international fleet of robotic orbiters, landers and rovers to keep a continuous flow of scientific information and discovery from Mars. The science and technology developed through Mars Exploration missions will enable humans to one day explore the Red Planet in person. Artist's concept depicts astronauts and human habitats on Mars.

Rover Basics

Each robotic explorer sent to the Red Planet has its own unique capabilities driven by science. Many attributes of a rover take on human-like features, such as “heads,” “bodies,” and “arms and legs."

A carefully selected international fleet of robotic orbiters, landers, and rovers keeps a continuous flow of scientific information and discovery from Mars.

Mars Missions

Mars 2020: Perseverance Rover

The Mars 2020 mission Perseverance rover is the first step of a journey that would return Mars samples to Earth. (2020-present)

Mars Sample Return

NASA and ESA (European Space Agency) are planning ways to bring the first samples of Mars material back to Earth for detailed study.

EXOMars Program

ESA’s (European Space Agency) Exobiology on Mars program consists of two missions: Trace Gas Orbiter and the Rosalind Franklin rover.

InSight was the first space robotic explorer to study in-depth the "inner space" of Mars: its crust, mantle, and core. (2018-2022)

MAVEN is obtaining critical measurements of Mars' atmosphere to help understand dramatic climate change over the planet's history. (2013-present)

Mars Reconnaissance Orbiter

MRO studies the planet's atmosphere and terrain from orbit and serves as a key data relay station for other Mars missions. (2005-present)

Mars Science Laboratory: Curiosity Rover

Curiosity is investigating Mars to determine whether the Red Planet ever was habitable to microbial life. (2011-present)

Mars Phoenix

Phoenix carried a complex suite of instruments to look for signs of water-ice in a region farther north than any previous mission. (2007-2008)

Mars Exploration Rovers: Spirit and Opportunity

A pair of Mars rovers that used field geology and atmospheric observations as they looked for signs of ancient water activity. (2003-2010)

Mars Express (ESA)

NASA is contributing advanced radar and radio relay systems to this ESA-ASI mission searching for sub-surface water from Mars orbit. (2003-present)

2001 Mars Odyssey

NASA's longest-lasting spacecraft at Mars is making the first global map of the amount and distribution of chemical elements and minerals that make up the Martian surface. (2001-present)

Mars Polar Lander/Deep Space 2

Mars Polar Lander's mission was to dig for water ice near the edge of the south polar cap and deploy two small surface probes, but all spacecraft were lost on arrival. (1999)

Mars Climate Orbiter

Designed to function as an interplanetary weather satellite and a communications relay for Mars Polar Lander, Mars Climate Orbiter was lost on arrival after entering the atmosphere too low. (1999-1999)

Mars Global Surveyor

Mars Global Surveyor studied the entire Martian surface, atmosphere, and interior, discovering repeatable weather patterns, gully formation, new boulder tracks, and recent impact craters. (1996-2006)

Mars Pathfinder

Mars Pathfinder demonstrated a new way to deliver an instrumented lander, and the first robotic rover, to the planet's surface, from which it returned data long past its primary design life. (1996-1997)

Mars Observer

Mars Observer was designed to study the geology, geophysics, and climate of Mars, but contact with the spacecraft was lost shortly before it was set to enter orbit around the planet. (1992-1993)

Vikings 1 & 2

The first U.S. mission to land a spacecraft safely on Mars and return images of the surface, Viking 1 was part of a pair of probes seeking signs of life on Mars. (1975-1982 )

Mars Mariner Missions

NASA's Mariner 9, launched days after Mariner 8, was the first spacecraft to orbit another planet and to orbit Mars, mapping 85% of the surface. (1971-1972)

The Future of Mars

NASA is reimagining the future of Mars exploration, driving new scientific discoveries, and preparing for humans on Mars. NASA’s Mars Exploration Program will focus the next two decades on its science-driven systemic approach on these strategic goals: exploring for potential life, understanding the geology and climate of Mars, and preparation for human exploration.

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Solar System Exploration

Asteroids, Comets & Meteors

Mars is the fourth planet from the Sun, and the seventh largest. It’s the only planet we know of inhabited entirely by robots.

All About Mars

Small World

Mars is 53% smaller than Earth.

Fourth Rock

Mars is 1.52 AU from the Sun. Earth = 1.

A Martian day is a little longer than Earth's; a Mars year is almost two Earth years.

Rocky Planet

Mars' surface has been altered by volcanoes, impacts, winds, and crustal movement.

Bring a Spacesuit

Mars' atmosphere is mostly carbon dioxide, argon, and nitrogen.

Phobos and Deimos are small compared to the planet.

Mars has no rings.

Many Missions

The first success was NASA's Mariner 4 flyby in 1965,

The Search for Life

Missions are determining Mars' past and future potential for life.

The Red Planet

Iron minerals in the Martian soil oxidize, or rust, causing the soil and atmosphere to look red.

Mars Overview

Mars is no place for the faint-hearted. It’s dry, rocky, and bitter cold. The fourth planet from the Sun, Mars, is one of Earth's two closest planetary neighbors (Venus is the other). Mars is one of the easiest planets to spot in the night sky – it looks like a bright red point of light.

Despite being inhospitable to humans, robotic explorers – like NASA's Perseverance rover – are serving as pathfinders to eventually get humans to the surface of the Red Planet.

Why Do We Go?

Mars is one of the most explored bodies in our solar system, and it's the only planet where we've sent rovers to explore the alien landscape. NASA missions have found lots of evidence that Mars was much wetter and warmer, with a thicker atmosphere, billions of years ago.

Mars Relay Network

How we explore.

Mars 2020: Perseverance Rover

The Mars 2020 mission Perseverance rover is the first step of a proposed roundtrip journey to return Mars samples to Earth.

Mars Sample Return

NASA and ESA (European Space Agency) are planning ways to bring the first samples of Mars material back to Earth for detailed study. 

Mars Curiosity Rover (Mars Science Laboratory)

Curiosity is investigating Mars to determine whether the Red Planet was ever habitable to microbial life.

Mars Resources

View the one-stop shop for all Mars iconic images, videos, and more!

News & Features

NASA Technology Grants to Advance Moon to Mars Space Exploration

NASA Selects Commercial Service Studies to Enable Mars Robotic Science

NASA Scientists Gear Up for Solar Storms at Mars

Major Martian Milestones

Why is Methane Seeping on Mars? NASA Scientists Have New Ideas

Beyond the Moon

Humans to mars.

Like the Moon, Mars is a rich destination for scientific discovery and a driver of technologies that will enable humans to travel and explore far from Earth.

Mars remains our horizon goal for human exploration because it is one of the only other places we know in the solar system where life may have existed. What we learn about the Red Planet will tell us more about our Earth’s past and future, and may help answer whether life exists beyond our home planet.

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Will humans ever go to Mars?

Mars has called to us since ancient times. To humans across the eons, the red-tinted speck glinting in the night sky has garnered special attention, with myths and legends wound around its possible ties to Earth. As we observed Mars with telescopes, this fondness graduated into a scientific fascination.

Within only about the last half century, as science has continued to advance, we gained the ability to  land scientific instruments on the Red Planet . Beginning with the Viking probes in 1976 and continuing through the  Perseverance rover  and its flying companion, the Ingenuity helicopter drone, this robotic exploration has allowed humans to discover complex secrets of Mars.

But this is far from the end of our ambitions. Indeed, humans have planned crewed missions to Mars since at least as far back as the 1950s. Scientists and CEOs alike have crafted intricate ideas to establish a presence on the Red Planet, ranging from small-scale research outposts to major settlements.  Elon Musk’s plans  to put a million people on Mars stand as a particularly bold example.

Yet even with all the money and influence being poured into the goal of putting boot prints in the Martian regolith, there remain considerable doubts that we will ever actually get there. Between economic and ecological problems mounting here on Earth and the major challenges facing even the most basic mission to send humans to Mars, the impetus to spend the money necessary to fund such an initiative has ebbed with the political tides perhaps more so than any other space mission.

The right equipment

Whether it be the dangers of deep-space radiation or the possibility of failure in the equipment that keeps them alive, the astronauts who travel to Mars will have to overcome dangers before, during, and after their trip to the Red Planet. But as the thousands of applications submitted to the now-defunct  Mars One  enterprise clearly show, plenty of people would gladly sign up.

What is it about Mars that draws people with such gravitas? It is a barren, desolate place, after all. That much has been clear from the  earliest flybys in the 1960s . The days in which dreamers like Percival Lowell and Edgar Rice Burroughs imagined Mars as a flawed but still inviting destination are long gone, replaced by an era in which futurists argue over whether it makes sense to terraform Mars, thereby altering the Red Planet into something more closely resembling Earth. (And essentially no one realistically addresses whether such a thing is actually possible.)

But the fascination remains, and the call of Mars is still as loud as it was to the futurists of the past. There seems to be something of a destiny in this call that makes it all but inevitable that humans will one day step down onto the surface of Mars, much as we once first stepped onto the surface of the Moon.

This history itself is instructive. In the earliest days of the Space Race, many people thought it inevitable that humans would one day set foot on the lunar surface, even if it took decades as opposed to the scant few years promised by visionaries like John F. Kennedy. But the illusion of inevitability is not proof of its existence in fact, as many failed predictions through history have shown.

Even the Moon landings were subject to faulty predictions.  The  New York Times ’ 1920 declaration  that rockets could not fly through space due to the lack of air comes readily to mind. Yet on July 21, 1969, two men from Earth stepped onto the surface of the Moon, proving all but the most determined doubters wrong. Will their spiritual successors at NASA and other space agencies one day follow suit on Mars? The first person to step on Mars likely walks among us now, and their moment in history may be coming soon.

The first step

Let’s look at things as they are now. Earlier in 2023, NASA and DARPA announced a partnership to design nuclear rockets, which some attest could be the first step toward a Mars mission. Elsewhere, analog habitats funded by organizations like the Mars Society simulate missions to Mars to prepare potential travelers for the journey. And futurists like Robert Zubrin and Elon Musk draw up plans to send people to Mars by as soon as the late 2020s, with Musk claiming he can establish a colony of one million people by 2100.

But does any of this mean that Mars pulls us toward its shores any more intensely now than at the height of Space Age optimism, when visions of grand cities on Mars seemed near to fulfillment? The basic fact is that, when humans set our minds to do something, we see it done much more often than not. The South Pole, the summit of Everest, and of course, the Sea of Tranquility are all evidence of that.

So while the exact details of a future Mars mission are unclear—where it will take place, who will be the first to step out of the spacecraft, what flag they will bear (if any), and perhaps most importantly, when it will happen?— the possibility that it does happen is much larger than the chance we will never set foot on Mars. It may take decades, but even if it takes another century, it seems likely that someone will one day become the “Neil Armstrong” on the Red Planet. When that one small step takes place is anyone’s guess, but the high probability that it will happen seems undeniable.

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NASA recently announced the crew of its upcoming Artemis II mission, which will be the first manned trip to the moon since 1972. The launch is being billed as the first step toward getting humans to Mars , but how does NASA plan to do that? Here's everything you need to know:

How will NASA get to Mars?

The journey will start with the Artemis program, which has the goal of establishing the first long-term human outpost on the moon. From there, NASA says , they "will use what we learn on and around the moon to take the next giant leap: sending the first astronauts to Mars."

In 2022, NASA unveiled a rough outline for its first crewed Mars mission, identifying "50 points falling under four overarching categories of exploration, including transportation and habitation; moon and Mars infrastructure; operations; and science." These objectives "will inform our exploration plans at the moon and Mars for the next 20 years," said NASA Deputy Administrator Pam Melroy.

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These objectives include , among other things, "[Developing] a transportation system that can deliver large surface elements from Earth to the Martian surface," as well as "[developing] Mars surface power sufficient for the initial human Mars demonstration mission," and building "entry, descent, and landing (EDL) systems capable of delivering crew and large cargo to the Martian surface."

However, there is still a ton of work to be done, as making a human trip to Mars "will be challenging," Space.com writes. The distance itself will play a major factor. Earth and Mars are an average of 140 million miles away from each other, and it would take about 500 days round-trip to get between the two planets, "assuming the funding and technology come into play at the right time," the outlet adds. A lack of gravity would also pose a significant problem, so crews may have to live in a pressurized cabin during the mission to help acclimatize to the change.

If all goes well — and that is a big "if" — Space.com notes that NASA "envisions using a habitat-like spacecraft to ferry crew members to the red planet, using a hybrid rocket stage (powered by both chemical and electrical propulsion)." The initial mission would be made by four people, with two making the journey to the Martian surface. But since you can't live on a desolate planet by yourself, NASA estimates the crew would need at least 25 tons of supplies awaiting them on Mars, which will have been delivered by a prior rover mission.

How will Artemis II help accomplish this goal?

The mission, set to launch toward the end of 2024, will be the first crewed flight of the Orion spacecraft, the vessel that has been tapped to send humans to Mars. Both the Orion and the Space Launch System (SLS) associated with it "are critical to NASA's exploration plans at the moon and beyond," the agency writes .

The Orion capsule is specifically designed to keep humans alive during months-long missions, and "will be equipped with advanced environmental control and life support systems designed for the demands of a deep space mission," per NASA . The first step in proving that these systems are viable will be a successful Artemis II mission, which CNN reports will go beyond the moon and "potentially further than any human has traveled in history."

The upcoming mission is only a flyby, and while humans will not land on the moon until Artemis III, operating on the lunar surface requires "systems that can reliably operate far from home, support the needs of human life, and still be light enough to launch," NASA writes. As a result, "exploration of the moon and Mars is intertwined," with the moon providing a platform to test "tools, instruments, and equipment that could be used on Mars ."

When does NASA plan to go to Mars?

That could depend on how fast things develop. In 2017, then-President Donald Trump signed an order directing NASA to send humans to Mars by 2033, and former President Barack Obama had set a similar goal of a mission in the 2030s, CNET reports.

NASA Administrator Bill Nelson pushed that date back slightly, saying the agency's plan "is for humans to walk on Mars by 2040," per CNN . Nelson added that the goal was to apply "what we've learned living and operating on the moon and continue them out into the solar system."

President Biden's budget proposal for the next fiscal year included an allocation of $27 billion to NASA, of which $7.6 billion would be used for deep-space exploration. However, negotiations on a budget deal are ongoing between Congress and the White House, so it remains to be seen how much of these potential NASA funds will actually see the light of day.

Who will go?

That probably won't be decided for years to come. Former NASA Administrator Jim Bridenstine said in 2019 that "we could very well see the first person on Mars be a woman," per Space.com , but no specifics regarding an astronaut class were given. Artemis III is expected to land both the first woman and first person of color on the moon, so it won't come as much of a surprise if a similarly diverse group heads to the red planet. Elon Musk, who has worked alongside NASA via his spaceflight company SpaceX, has said he believes humans will be on Mars by 2029 at the latest, but he hasn't provided any names either.

For now, though, the question of who will be the first person to place their boots on the Martian surface remains a mystery.

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 Justin Klawans has worked as a staff writer at The Week since 2022. He began his career covering local news before joining Newsweek as a breaking news reporter, where he wrote about politics, national and global affairs, business, crime, sports, film, television and other Hollywood news. Justin has also freelanced for outlets including Collider and United Press International.  

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The future of spaceflight—from orbital vacations to humans on Mars

NASA aims to travel to the moon again—and beyond. Here’s a look at the 21st-century race to send humans into space.

Welcome to the 21st-century space race, one that could potentially lead to 10-minute space vacations, orbiting space hotels , and humans on Mars. Now, instead of warring superpowers battling for dominance in orbit, private companies are competing to make space travel easier and more affordable. This year, SpaceX achieved a major milestone— launching humans to the International Space Station (ISS) from the United States —but additional goalposts are on the star-studded horizon.

Private spaceflight

Private spaceflight is not a new concept . In the United States, commercial companies played a role in the aerospace industry right from the start: Since the 1960s, NASA has relied on private contractors to build spacecraft for every major human spaceflight program, starting with Project Mercury and continuing until the present.

Today, NASA’s Commercial Crew Program is expanding on the agency’s relationship with private companies. Through it, NASA is relying on SpaceX and Boeing to build spacecraft capable of carrying humans into orbit. Once those vehicles are built, both companies retain ownership and control of the craft, and NASA can send astronauts into space for a fraction of the cost of a seat on Russia’s Soyuz spacecraft.

SpaceX, which established a new paradigm by developing reusable rockets , has been running regular cargo resupply missions to the International Space Station since 2012. And in May 2020, the company’s Crew Dragon spacecraft carried NASA astronauts Doug Hurley and Bob Behnken to the ISS , becoming the first crewed mission to launch from the United States in nearly a decade. The mission, called Demo-2, is scheduled to return to Earth in August. Boeing is currently developing its Starliner spacecraft and hopes to begin carrying astronauts to the ISS in 2021.

Other companies, such as Blue Origin and Virgin Galactic , are specializing in sub-orbital space tourism. Test launch video from inside the cabin of Blue Origin’s New Shepard shows off breathtaking views of our planet and a relatively calm journey for its first passenger, a test dummy cleverly dubbed “Mannequin Skywalker.” Virgin Galactic is running test flights on its sub-orbital spaceplane , which will offer paying customers roughly six minutes of weightlessness during its journey through Earth’s atmosphere.

With these and other spacecraft in the pipeline, countless dreams of zero-gravity somersaults could soon become a reality—at least for passengers able to pay the hefty sums for the experience.

Early U.S. Spaceflight

Looking to the moon

Moon missions are essential to the exploration of more distant worlds. After a long hiatus from the lunar neighborhood, NASA is again setting its sights on Earth’s nearest celestial neighbor with an ambitious plan to place a space station in lunar orbit sometime in the next decade. Sooner, though, the agency’s Artemis program , a sister to the Apollo missions of the 1960s and 1970s, is aiming to put the first woman (and the next man) on the lunar surface by 2024.

For Hungry Minds

Extended lunar stays build the experience and expertise needed for the long-term space missions required to visit other planets. As well, the moon may also be used as a forward base of operations from which humans learn how to replenish essential supplies, such as rocket fuel and oxygen, by creating them from local material.

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Such skills are crucial for the future expansion of human presence into deeper space, which demands more independence from Earth-based resources. And although humans have visited the moon before, the cratered sphere still harbors its own scientific mysteries to be explored—including the presence and extent of water ice near the moon's south pole, which is one of the top target destinations for space exploration .

NASA is also enlisting the private sector to help it reach the moon. It has awarded three contracts to private companies working on developing human-rated lunar landers—including both Blue Origin and SpaceX. But the backbone of the Artemis program relies on a brand new, state-of-the-art spacecraft called Orion .

Archival Photos of Spaceflight

Currently being built and tested, Orion—like Crew Dragon and Starliner—is a space capsule similar to the spacecraft of the Mercury, Gemini, and Apollo programs, as well as Russia’s Soyuz spacecraft. But the Orion capsule is larger and can accommodate a four-person crew. And even though it has a somewhat retro design, the capsule concept is considered to be safer and more reliable than NASA’s space shuttle—a revolutionary vehicle for its time, but one that couldn’t fly beyond Earth’s orbit and suffered catastrophic failures.

Capsules, on the other hand, offer launch-abort capabilities that can protect astronauts in case of a rocket malfunction. And, their weight and design mean they can also travel beyond Earth’s immediate neighborhood, potentially ferrying humans to the moon, Mars, and beyond.

A new era in spaceflight

By moving into orbit with its Commercial Crew Program and partnering with private companies to reach the lunar surface, NASA hopes to change the economics of spaceflight by increasing competition and driving down costs. If space travel truly does become cheaper and more accessible, it’s possible that private citizens will routinely visit space and gaze upon our blue, watery home world—either from space capsules, space stations, or even space hotels like the inflatable habitats Bigelow Aerospace intends to build .

The United States isn’t the only country with its eyes on the sky. Russia regularly launches humans to the International Space Station aboard its Soyuz spacecraft. China is planning a large, multi-module space station capable of housing three taikonauts, and has already launched two orbiting test vehicles—Tiangong-1 and Tiangong-2, both of which safely burned up in the Earth’s atmosphere after several years in space.

Now, more than a dozen countries have the ability to launch rockets into Earth orbit. A half-dozen space agencies have designed spacecraft that shed the shackles of Earth’s gravity and traveled to the moon or Mars. And if all goes well, the United Arab Emirates will join that list in the summer of 2020 when its Hope spacecraft heads to the red planet . While there are no plans yet to send humans to Mars, these missions—and the discoveries that will come out of them—may help pave the way.

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Why go to Mars?

Mars is an obvious target for exploration because it is close by in our Solar System, but there are many more reasons to explore the Red Planet. The scientific reasons for going to Mars can be summarised by the search for life, understanding the surface and the planet’s evolution, and preparing for future human exploration.

Searching for life on Mars Understanding whether life existed elsewhere in the Universe beyond Earth is a fundamental question of humankind. Mars is an excellent place to investigate this question because it is the most similar planet to Earth in the Solar System. Evidence suggests that Mars was once full of water, warmer and had a thicker atmosphere, offering a potentially habitable environment.

Understanding the surface of Mars and its evolution

While life arose and evolved on Earth, Mars experienced serious climate change. Planetary geologists can study rocks, sediments and soils for clues to uncover the history of the surface. Scientists are interested in the history of water on Mars to understand how life could have survived. Volcanoes, craters from meteoroid impacts, signs of atmospheric or photochemical effects and geophysical processes all carry aspects of Mars’ history.

Samples of the atmosphere could reveal crucial details on its formation and evolution, and also why Mars has less atmosphere than Earth.

Mars can also help us to learn more about our home. Understanding martian geophysical processes promises to uncover details of the evolution and history of Earth and other planets in our Solar System.

Human exploration

To reduce the cost and risk for human exploration of Mars, robotic missions can scout ahead and help us to find potential resources and the risks of working on the planet.

Before sending astronauts, we need to understand the hazards. Inevitably, astronauts would bring uncontained martian material when they return to Earth, either on their equipment or on themselves. Understanding any biohazards in the soil and dust will help the planning and preparation of these future missions.

Going to Mars is hard and it is even harder for humans because we would need to pack everything to survive the trip to our neighbouring planet and back. Designing a Mars mission would be easier if we could use resources that are already available locally. Water is a valuable resource for human expeditions, both to consume by astronauts and for fuel. Samples gathered by robots could help to evaluate where potential resources are available for future human explorers and how to exploit them.

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August 10, 2021

The Ethics of Sending Humans to Mars

We need to avoid the mistakes European countries made during the age of colonization

By Nicholas Dirks

Mark Garlick Getty Images

With Jeff Bezos and Richard Branson recently completing their pioneering space flights that could set the stage for future space tourism, it is worth taking a look at what might be involved for the human exploration of Mars, even though it’s likely decades away.

Elon Musk is perhaps the best-known advocate for going to Mars, but the idea is decades old. In a 1966 Annals of the New York Academy of Sciences paper , Gordon R. Woodcock of the George C. Marshall Space Flight Center theorized how the Saturn V launch vehicle—at the time in development for the Apollo lunar missions—could be used for a Mars exploration. Technical challenges aside, as we continue to expand our exploration of Mars, there is a broader ethical question at play. What might be the lessons of past voyages of discovery and colonization that we should be thinking about? History provides us with many cautionary tales.

Human exploration has led to many extraordinary new discoveries, but it has also led inexorably to the appropriation and exploitation of natural as well as human resources. The desire to gain control over various commodities such as spices, sugar and oil, propelled both global discovery and the drive for political and economic domination. During the age of empire, European nations derived their wealth and power from colonizing various global regions and controlling land, labor and military power to advance their own interests.

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After the early European settling of what would become the United States, the American colonists declared their independence from an unjust English authority and created the Constitution by which our modern society functions. This did not, however, prevent the settlers from referring to native people as savages and excluding them from the assertion of rights to liberty and happiness.

Then there is the question of “ownership”: does the first country that plants its flag on the surface of another world get to claim ownership? Such claims have been made many times before, and they do not bode any better for the future of space exploration than they have for human history on Earth. Clearly if we are to settle another planet—and likely it will be a multinational effort if we do—we’ll need to write a constitution for Mars, one that would learn from past mistakes, much like in the assignment set by Yale’s Hélène Landemore in a recent course on the political theory of constitutions.

Consider also the issue of Mars’ fragile ecosystem. The planet certainly has a hostile environment for human life, but on Mars, humans will be the invasive species with all that implies. The native occupants of the newly decolonized land of America were quickly decimated by systematic warfare and new diseases as the new settlers expanded their territory. The natural environment with which Native Americans had established a harmonious and symbiotic relationship, was similarly despoiled by the twin logic of expropriation and colonization that spread under the logic of manifest destiny .

Biological life aside, it is possible that Mars has minerals that could have extraordinary properties ideal for future development. We have seen on Earth how mining has had devastating environmental impacts; to think there would be anything less of an impact on the Martian environment is disingenuous.

Based on early missions and recent images sent from NASA’s Ingenuity and China’s Zhurong rover , the Martian landscape appears to be a frigid desert, with no visible trace of life. But the same could be said by aliens if they were to land in the vast desolation of the Gobi Desert. Given the first impression of Mars from pictures sent back by robotic explorers, notions of hostile creatures such as those envisioned in H.G. Wells’ novel The War of the Worlds, and in movies such as Alien and Independence Day , seem unlikely. But we should be wary of characterizing “life” based solely on Earthly experience.

Stephen Hawking once warned that contact with an extraterrestrial civilization could result in the inevitable destruction of our own. Such an idea is not so far-fetched when you consider the current cost in human lives and economic devastation from a new Earth-based virus that blindsided us when we weren’t looking. While it is unlikely that we will be invaded by multilimbed creatures bent on Earth’s destruction using death rays, we cannot rule out the possibility that there could be a kernel of reality in Hawking’s prophecy.

The technological achievements of the teams at NASA and other space agencies are certainly to be applauded. And the contributions of the related research stemming from the fields of physics, material science, chemistry, medicine and many others is potentially limitless.

As we look to exploring worlds beyond our own, we need to begin now to look at history—while also adopting a more anthropological lens—to consider how best to engage with radically different life forms, cultures and environments. We may be capable of writing a new constitution and committing ourselves to an entirely new form of engagement with other places (and perhaps peoples), but we should begin with the presumption that we need to counter our own invasive impact on another planet that may be completely defenseless—before we embark on a new era of galactic exploration and imperial conquest.

Want to travel to Mars? Here’s how long the trip could take.

Nuclear engines or not, you're gonna need a lot of PTO to get to the Red Planet.

By Eva Botkin-Kowacki | Published Feb 21, 2023 6:00 AM EST

Despite what Star Trek’s warp-speed journeys would have us believe, interplanetary travel is quite the hike. Take getting to Mars. Probes sent to the Red Planet by NASA and other space agencies spend about seven months in space before they arrive at their destination. A trip for humans would probably be longer—likely on the timescale of a few years. 

There are a lot of things that a human crew needs to survive that robots don’t, such as food, water, oxygen, and enough supplies for a return—the weight of which can slow down a spacecraft. With current technology, NASA calculations estimate a crewed mission to Mars and back, plus time on the surface , could take somewhere between two and three years. “Three years we know for sure is feasible,” says Michelle Rucker, who leads NASA’s Mars Architecture Team in the agency’s ​​ Human Exploration and Operations Mission Directorate .

But NASA aims to shorten that timeline, in part because it would make a Mars mission safer for humans—we still don’t know how well the human body can withstand the environment of space for an extended period. (The record for most consecutive days in space is 437.) The agency is investing in projects to develop new propulsion technologies that might enable more expeditious space travel. 

A crooked path to Mars

In a science-fictional world, a spacecraft would blast off Earth and head directly to Mars. That trajectory would certainly make for a speedier trip. But real space travel is a lot more complicated than going from point A to point B.

“If you had all the thrust you want, you could ignore the fact that there happens to be gravity in our universe and just plow all the way through the solar system,” says Mason Peck , a professor of astronautics at Cornell University who served as NASA’s chief technologist from 2011 to 2013. “But that’s not a scenario that’s possible right now.”

Such a direct trajectory has several challenges. As a spacecraft lifts off Earth, it needs to escape the planet’s gravitational pull, which requires quite a bit of thrust. Then, in space, the force of gravity from Earth, Mars, and the sun pulls the spacecraft in different directions. When it is far enough away, it will settle into orbit around the sun. Bucking that gravity requires fuel-intensive maneuvers.

[Related: Signs of past chemical reactions detected on Mars ]

The second challenge is that the planets do not stay in a fixed place. They orbit the sun, each at its own rate: Mars will not be at the same distance from Earth when the spacecraft launches as the Red Planet will be, say, seven months later. 

As such, the most fuel-efficient route to Mars follows an elliptical orbit around the sun, Peck says. Just one-way, that route covers hundreds of millions of miles and takes over half a year, at best. 

But designing a crewed mission to the Red Planet isn’t just about figuring out how fast a spacecraft can get there and back. It’s about “balance,” says Patrick Chai, in-space propulsion lead for NASA’s Mars Architecture Team . “There are a whole bunch of decisions we have to make in terms of how we optimize for certain things. Where do we trade performance for time?” Chai says. “If you just look at one single metric, you can end up making decisions that are really great for that particular metric, but can be problematic in other areas.”

One major trade-off for speed has to do with how much stuff is on board. With current technology, every maneuver to shorten the trip to Mars requires more fuel. 

If you drive a car, you know that in order to accelerate the vehicle, you step on the gas. The same is true in a spacecraft, except that braking and turning also use fuel. To slow down, for instance, a spacecraft fires its thrusters in the opposite direction to its forward motion.

But there are no gas stations in space. More fuel means more mass on board. And more mass requires more fuel to propel that extra mass through the air… and so on. Trimming a round-trip mission down to two years is when this trade-off starts to become exponentially less efficient, Rucker says. At least, that’s with current technology.

New tech to speed up the trip

NASA would like to be able to significantly reduce that timeline. In 2018, the space agency requested proposals for technological systems that could enable small, uncrewed missions to fly from Earth to Mars in 45 days or less . 

At the time, the proposals didn’t gain much traction. But the challenge inspired engineers to design innovative propulsion systems that don’t yet exist. And now, NASA has begun to fund the development of leading contenders. In particular, the space agency has its eye on nuclear propulsion.

Spacecraft currently rely largely on chemical propulsion. “You basically take an oxidizer and a fuel, combine them, and they combust, and that generates heat. You accelerate that heated product through a nozzle to generate thrust,” explains NASA’s Chai. 

Engineers have known for decades that a nuclear-based system could generate more thrust using a significantly smaller amount of fuel than a chemical rocket. They just haven’t built one yet—though that might be about to change.

One of NASA’s nuclear investment projects aims to integrate a nuclear thermal engine into an experimental spacecraft. The Demonstration Rocket for Agile Cislunar Operations , or DRACO, program, is a collaboration with the Defense Advanced Research Projects Agency (DARPA), and aims to demonstrate the resulting technology as soon as 2027 .

[Related: Microbes could help us make rocket fuel on Mars ]

The speediest trip to Mars might come from another project, however. This concept, the brainchild of researchers at the University of Florida and supported by a NASA grant, seeks to achieve what Chai calls the “holy grail” of nuclear propulsion: a combination system that pairs nuclear thermal propulsion with an electric kind. 

“We did some preliminary analysis, and it seems like we can get pretty close to [45 days],” says the leader of that project, Ryan Gosse, a professor of practice in the University of Florida’s in-house applied research program, Florida Applied Research in Engineering (FLARE). One caveat: That timeline is for a light payload and no humans on board. However, if the project is successful, the technology could potentially be scaled up in the future to support a crewed mission.

There are two types of nuclear propulsion, and both have their merits. Nuclear thermal propulsion, which uses heat, can generate a lot of thrust quickly from a small amount of fuel. Nuclear electric propulsion, which uses charged particles, is even more fuel-efficient but generates thrust much more slowly.

“While you’re in deep space, the electric propulsion is really great because you have all the time in the world to thrust. The efficiency, the miles per gallon, is far, far superior than the high-thrust,” Chai says. “But when you’re around planets, you want that oomph to get you out of the gravity well.”

The challenge, however, is that both technologies currently require different types of nuclear reactors, says Gosse. And that means two separate systems, which reduces the efficiency of having a nuclear propulsion system. So Gosse and his team are working to develop technology that can use the one system to generate both types of propulsion.

NASA’s Mars architecture team is also working with a bimodal concept that uses a chemical propulsion system to maneuver around planets and solar-powered electric propulsion to do the thrusting in deep space.

“What we are developing is different tools for the toolbox,” says NASA’s Rucker. “One tool isn’t going to be enough to do all of the exploration that we want to do. So we’re working on all of these.”

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NASA shows off early plans to send astronauts to Mars for 30 days

The agency also wants feedback about its concept.

We have a glimpse now of NASA's latest vision for its first crewed Mars mission.

The agency released its top objectives for a 30-day, two-person Mars surface mission on Tuesday (May 17) and asked the public to provide feedback on how the planning is going. Submissions were initially due on May 31, but that deadline was recently extended to June 3.

NASA aims to launch astronauts to Mars by the late 2030s or early 2040s. Making that vision a reality will be challenging. Assuming the funding and technology come into play at the right time, for example, the round-trip travel time would still be about 500 days given the distance between Earth and Mars.

Related: How living on Mars would challenge colonists (infographic)

Gravity — or the lack thereof — would also be a problem, as current-generation spacecraft look nothing like those seen in movies like "The Martian" (2015). The astronauts will arrive on the Red Planet after months in microgravity and face a significant road to recovery, even to operate in the partial gravity of Mars, which is roughly one-third that of Earth. NASA suggests that one way to address this issue might be having the crews live in a pressurized rover during their mission.

"We want to maximize the science so we allow them to drive around before they become conditioned enough to get in the spacesuits, and walk and maximize that science in 30 days," Kurt Vogel, NASA director of space architectures, said in a 30-minute YouTube video accompanying the data release.

The mission plan is in the early stages and could change considerably. But so far, NASA envisions using for a habitat-like spacecraft to ferry crewmembers to the Red Planet, using a hybrid rocket stage (powered by both chemical and electrical propulsion). Four people would make the long journey, with two alighting on the surface, somewhat similar to the model seen in the Apollo program with three astronauts.

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Roughly 25 tons of supplies and hardware would be ready and waiting for the crew, delivered by a previous robotic mission. These supplies would include a crew ascent vehicle, already fueled and ready to go for the astronauts to make it off Mars and  back into orbit around the planet.

— 12 amazing photos from the Perseverance rover's 1st year on Mars — NASA's Curiosity rover shares spectacular views of Mars — See a sunrise on Mars in this stunning view from NASA's InSight lander (photo)

NASA is not issuing a standard request for information or formal contract process for this mission concept yet. After all, the agency is focused on getting its uncrewed Artemis 1 mission off the ground to get ready for astronaut missions to the moon in the 2020s. (NASA has said the moon work is essential to getting ready for Mars.)

But more stakeholder input on Mars is forthcoming. The agency pledged to have a workshop in June "with partners from American industry and academia," who are invited individually by NASA. Invited international organizations can also weigh in during a workshop in July.

You can view more details about NASA's objectives (there are 50 in all) before submitting your comments on this website , through June 3.

Follow Elizabeth Howell on Twitter @howellspace. Follow us on Twitter  @Spacedotcom  and on  Facebook . 

Join our Space Forums to keep talking space on the latest missions, night sky and more! And if you have a news tip, correction or comment, let us know at: [email protected].

Elizabeth Howell (she/her), Ph.D., is a staff writer in the spaceflight channel since 2022 covering diversity, education and gaming as well. She was contributing writer for Space.com for 10 years before joining full-time. Elizabeth's reporting includes multiple exclusives with the White House and Office of the Vice-President of the United States, an exclusive conversation with aspiring space tourist (and NSYNC bassist) Lance Bass, speaking several times with the International Space Station, witnessing five human spaceflight launches on two continents, flying parabolic, working inside a spacesuit, and participating in a simulated Mars mission. Her latest book, " Why Am I Taller ?", is co-written with astronaut Dave Williams. Elizabeth holds a Ph.D. and M.Sc. in Space Studies from the University of North Dakota, a Bachelor of Journalism from Canada's Carleton University and a Bachelor of History from Canada's Athabasca University. Elizabeth is also a post-secondary instructor in communications and science at several institutions since 2015; her experience includes developing and teaching an astronomy course at Canada's Algonquin College (with Indigenous content as well) to more than 1,000 students since 2020. Elizabeth first got interested in space after watching the movie Apollo 13 in 1996, and still wants to be an astronaut someday. Mastodon: https://qoto.org/@howellspace

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Could people breathe the air on Mars?

Ph.D. Student in Geological Sciences, University of Florida

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Disclosure statement

Phylindia Gant is a student collaborator on the M2020 rover. She receives funding through the University of Central Florida's NASA Florida Space Grant Consortium. She is a first year Geology PhD student at the University of Florida.

Amy J. Williams receives relevant funding from NASA's Mars Science Laboratory rover and M2020 rover Participating Scientist Programs, as well as through the University of Central Florida's NASA Florida Space Grant Consortium and Space Florida, and the Florida Space Institute. She is an assistant professor of Earth & Planetary Science at the University of Florida.

University of Florida provides funding as a founding partner of The Conversation US.

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Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to [email protected] .

Could people breathe on Mars? – Jack J., age 7, Alexandria, Virginia

Let’s suppose you were an astronaut who just landed on the planet Mars . What would you need to survive?

For starters, here’s a short list: Water, food, shelter – and oxygen.

Oxygen is in the air we breathe here on Earth. Plants and some kinds of bacteria provide it for us.

But oxygen is not the only gas in the Earth’s atmosphere. It’s not even the most abundant. In fact, only 21% of our air is made up of oxygen. Almost all the rest is nitrogen – about 78%.

Now you might be wondering: If there’s more nitrogen in the air, why do we breathe oxygen?

Here’s how it works: Technically, when you breathe in, you take in everything that’s in the atmosphere. But your body uses only the oxygen; you get rid of the rest when you exhale.

The air on Mars

The Martian atmosphere is thin – its volume is only 1% of the Earth’s atmosphere. To put it another way, there’s 99% less air on Mars than on Earth.

That’s partly because Mars is about half the size of Earth. Its gravity isn’t strong enough to keep atmospheric gases from escaping into space.

And the most abundant gas in that thin air is carbon dioxide. For people on Earth, that’s a poisonous gas at high concentrations. Fortunately, it makes up far less than 1% of our atmosphere. But on Mars, carbon dioxide is 96% of the air!

Meanwhile, Mars has almost no oxygen; it’s only one-tenth of one percent of the air, not nearly enough for humans to survive.

If you tried to breathe on the surface of Mars without a spacesuit supplying your oxygen – bad idea – you would die in an instant. You would suffocate, and because of the low atmospheric pressure , your blood would boil, both at about the same time.

Life without oxygen

So far, researchers have not found any evidence of life on Mars. But the search is just beginning; our robotic probes have barely scratched the surface.

Without question, Mars is an extreme environment. And it’s not just the air. Very little liquid water is on the Martian surface . Temperatures are incredibly cold – at night, it’s more than -100 degrees Fahrenheit (-73 degrees Celsius).

But plenty of organisms on Earth survive extreme environments . Life has been found in the Antarctic ice, at the bottom of the ocean and miles below the Earth’s surface. Many of those places have extremely hot or cold temperatures, almost no water and little to no oxygen.

And even if life no longer exists on Mars, maybe it did billions of years ago, when it had a thicker atmosphere, more oxygen , warmer temperatures and significant amounts of liquid water on the surface .

That’s one of the goals of NASA’s Mars Perseverance rover mission – to look for signs of ancient Martian life. That’s why Perseverance is searching within the Martian rocks for fossils of organisms that once lived – most likely, primitive life, like Martian microbes.

Do-it-yourself oxygen

Among the seven instruments on board the Perseverance rover is MOXIE , an incredible device that takes carbon dioxide out of the Martian atmosphere and turns it into oxygen.

If MOXIE works the way that scientists hope it will, future astronauts will not only make their own oxygen; they could use it as a component in the rocket fuel they’ll need to fly back to Earth. The more oxygen people are able to make on Mars, the less they’ll need to bring from Earth – and the easier it becomes for visitors to go there. But even with “homegrown” oxygen, astronauts will still need a spacesuit.

Right now, NASA is working on the new technologies needed to send humans to Mars . That could happen in the next decade, perhaps sometime during the late 2030s. By then, you’ll be an adult – and maybe one of the first to take a step on Mars.

Hello, curious kids! Do you have a question you’d like an expert to answer? Ask an adult to send your question to [email protected] . Please tell us your name, age and the city where you live.

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SpaceX: Here’s the Timeline for Getting to Mars and Starting a Colony

SpaceX is aiming for a much faster timeframe, with a series of 10 launches to start a city by 2050. Here’s how it looks.

Elon Musk has a grand plan for getting humanity out of the confines of Earth, setting off to the moon, Mars, and even further reaches of the solar system. Musk has regularly estimated that humans could establish a city on Mars as early as 2050.

As CEO of SpaceX, he has led the development of the Starship. The rocket is designed to refuel and relaunch using liquid hydrogen and methane, unlike the rocket propellant used in the Falcon 9 and Falcon Heavy. That means astronauts will be able to set up refueling depots around the solar system, hopping from planet to planet. Still under development, the Starship could see its first commercial flight as early as 2021 .

Many plans for a Mars settlement expect a community in matters of decades. The United Arab Emirates aims for a city of 600,000 by 2117. Astrobiologist Lewis Dartnell told Inverse in October that “while the first human mission to land on Mars will likely take place in the next two decades, it will probably be more like 50-100 years before substantial numbers of people have moved to Mars to live in self-sustaining towns.”

SpaceX is aiming for a much, much faster timeframe, with a series of 10 launches to start a city by 2050. Here’s how it looks:

SpaceX’s Mars Plan: 2019

The company is set to hold the first “hop tests” for its Mars-bound Starship this year, seeing if the rocket can jump a few hundred kilometers. SpaceX has been developing a test facility in Boca Chica, Texas, shipping over 300,000 cubic yards of locally-sourced soil. In July 2018, the firm took shipment of a 95,000-gallon liquid oxygen tank, around the same capacity as 20 tanker trucks. It’s also completed a 600-kilowatt solar array and two ground station antennas that may also prove useful for Crew Dragon missions. In October 2018, it took shipment of the final major ground tank system to support the initial flights.

CEO Elon Musk previously described these tests as “fly out, turn around, accelerate back real hard and come in hot to test the heat shield because we want to have a highly reusable heat shield that’s capable of absorbing the heat from interplanetary entry velocities.” The tests were originally set to take place in the first few weeks of 2019, but a storm blew over the “hopper” test vehicle.

The firm completed its first hop test firing in April, reaching a few centimeters off the ground. More are expected later this year.

SpaceX's final Starship Hopper

Assuming all goes well, it’s onto the next stage. In January, Musk claimed that the first orbital Starship prototype may arrive as early as June, which could help accelerate testing and move select plans to an earlier stage of the schedule.

SpaceX’s Mars Plan: 2020

As the United States holds its next presidential election, SpaceX will be working on the next stage of Starship tests. This year’s tests cover the booster, as well as high altitude, high-velocity flights. The team is expected to conduct a number of test flights before actually placing anyone on board. An orbital Starship could make its flight debut at this time.

SpaceX’s Mars Plan: 2021

The Starship is set to embark on its first commercial flight. Jonathan Hofeller, SpaceX vice president of commercial sales, revealed at a conference in Indonesia that the plan is to host the first flight around this time.

The Starship’s first voyage could see it send a commercial satellite into space for one of three telecoms firms. That sounds like a job for the Falcon 9 and Falcon Heavy, but if all goes well it could prove the Starship’s viability for future missions and help fund its further development.

“You could potentially recapture a satellite and bring it down if you wanted to,” Hofeller said. “It’s very similar to the [space] shuttle bay in that regard. So we have this tool, and we are challenging the industry: what would you do with it?”

SpaceX’s Mars Plan: 2022

This could be the first year that SpaceX reaches Mars. At the International Astronautical Congress in Adelaide, Australia, in September 2017, Musk suggested this year as the point at which at least two unmanned ships could make their way to Mars. The two planets will be at an ideal point to send a rocket in 2022, a phenomenon that occurs roughly every two years.

SpaceX previously released concept art of the Starship on its way to distant planets, based around the older design rather than the more recent stainless steel iteration pictured above:

The Starship.

“I feel fairly confident that we can complete the ship and prepare the ship for launch in about five years,” he said. “Five years feels like a long time to me.”

The ships would place power, mining and life support infrastructure for future flights. They would also confirm water resources and identify hazards. Each ship would carry around 100 tons of supplies.

However, in February, Musk suggested that SpaceX has more pressing missions:

SpaceX’s Mars Plan: 2023

This is the year when SpaceX is expected to send Japanese billionaire Yukazu Maezawa , alongside six to eight artists, on a trip around the moon using the Starship. While not specifically a Mars-focused mission, its success would bode well for a future manned mission. Based on Musk’s February comments, this could be the first major mission for the Starship.

The path that Starship will take when on the Lunar Mission.

SpaceX’s Mars Plan: 2024

It’s time for another election for president of the United States. It’s also the next time that the Earth and Mars are suitably aligned to send a rocket.

There’s a high chance that, based on Musk’s previous comments, SpaceX will not send two cargo ships to Mars in 2022 as previously suggested. If this prediction holds true, this will be the next ideal moment that SpaceX can send the cargo ships and lay the groundwork for a further mission.

If SpaceX has sent the two cargo ships by this stage, the next step will be the manned mission. The plan is to send two cargo ships, alongside two crew ships taking the first people to Mars. They will be tasked with setting up a propellant production plant, combining Martian water, ice, and carbon dioxide to create methane and liquid oxygen to fuel the ships and come back home. The humans would be tasked with collecting one tonne of ice every day to fuel the plant.

The first humans will also likely have to use solar-powered hydroponics to feed the plants and grow more food. Musk said in a February interview that the technology, which allows plants to grow without soil, is already in use on Earth and the same techniques could immediately apply to the Mars colony.

The Starship on Mars.

In short, it’s not going to be a leisurely visit. Musk stated at the South by Southwest Festival in Austin, Texas in March this year, that Mars and the moon “are often thought of as some escape hatch for rich people, but it won’t be that at all.”

SpaceX’s Mars Plan: 2025

This is the earliest point at which Musk thinks a Mars colony could take shape . The CEO has predicted a timeframe of “7 to 10 years” before the first bases take shape.

This will expand on the work left behind by the first humans. Paul Wooster, principal Mars development engineer for SpaceX, explained that “the idea would be to expand out, start off not just with an outpost, but grow into a larger base, not just like there are in Antarctica, but really a village, a town, growing into a city and then multiple cities on Mars.” The larger cities would offer habitats, greenhouses, life support, and enable new experiments that help to answer some of the big questions about life on Mars.

A potential future Mars city.

SpaceX’s Mars Plan: 2026

This could be the next time that SpaceX sends more ships to Mars. Musk explained on Twitter that the company could use 10 orbital synchronizations to complete a city by the year 2050. With the two planets set to align in February 2027, this could be about the right time to complete another launch.

SpaceX’s Mars Plan: Beyond

By the end of the next decade, SpaceX expects to have some sort of settlement on Mars. Musk has said there’s a 70 percent chance he’ll visit Mars himself in his lifetime, perhaps paying a visit to this developing colony. That is, depending on how the first settlements go — Musk said in 2016 that “probably people will die,” but “ultimately, it will be very safe to go to Mars, and it will be very comfortable.”

Mars could perhaps serve as a base for more ambitious missions, with Musk describing the Starship as “really intended as an interplanetary transport system that’s capable of getting from Earth to anywhere in the solar system as you establish propellant depots along the way.”

Leaving for further adventures.

Beyond transforming humanity into a space-faring civilization, it could also preserve the species. SpaceX president Gwynne Shotwell said in April that “if something were to happen on Earth, you need humans living somewhere else…I think you need multiple paths to survival, and this is one of them.”

Related video: Elon Musk Predicts Our Future On Mars At SXSW 2018

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Mars Sample Return Option Emerges In '2024 Humans To Mars Summit'

NASA's Perseverance rover acquires a Mars sample.

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Nasa’s journey to mars.

NASA is developing the capabilities needed to send humans to an asteroid by 2025 and Mars in the 2030s – goals outlined in the bipartisan NASA Authorization Act of 2010 and in the U.S. National Space Policy, also issued in 2010.

Mars is a rich destination for scientific discovery and robotic and human exploration as we expand our presence into the solar system. Its formation and evolution are comparable to Earth, helping us learn more about our own planet’s history and future. Mars had conditions suitable for life in its past. Future exploration could uncover evidence of life, answering one of the fundamental mysteries of the cosmos: Does life exist beyond Earth?

While robotic explorers have studied Mars for more than 40 years, NASA’s path for the human exploration of Mars begins in low-Earth orbit aboard the International Space Station. Astronauts on the orbiting laboratory are helping us prove many of the technologies and communications systems needed for human missions to deep space, including Mars. The space station also advances our understanding of how the body changes in space and how to protect astronaut health.

Our next step is deep space, where NASA will send a robotic mission to capture and redirect an asteroid to orbit the moon. Astronauts aboard the Orion spacecraft will explore the asteroid in the 2020s, returning to Earth with samples. This experience in human spaceflight beyond low-Earth orbit will help NASA test new systems and capabilities, such as Solar Electric Propulsion, which we’ll need to send cargo as part of human missions to Mars. Beginning in FY 2018, NASA’s powerful Space Launch System rocket will enable these “proving ground” missions to test new capabilities. Human missions to Mars will rely on Orion and an evolved version of SLS that will be the most powerful launch vehicle ever flown.

A fleet of robotic spacecraft and rovers already are on and around Mars, dramatically increasing our knowledge about the Red Planet and paving the way for future human explorers. The Mars Science Laboratory Curiosity rover measured radiation on the way to Mars and is sending back radiation data from the surface. This data will help us plan how to protect the astronauts who will explore Mars. Future missions like the Mars 2020 rover, seeking signs of past life, also will demonstrate new technologies that could help astronauts survive on Mars.

Engineers and scientists around the country are working hard to develop the technologies astronauts will use to one day live and work on Mars, and safely return home from the next giant leap for humanity. NASA also is a leader in a Global Exploration Roadmap, working with international partners and the U.S. commercial space industry on a coordinated expansion of human presence into the solar system, with human missions to the surface of Mars as the driving goal. Follow our progress at www.nasa.gov/exploration and www.nasa.gov/mars .

> NASA’s Orion Flight Test and the Journey to Mars

Image Credit: NASA

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NASA's Proposed Plasma Rocket Would Get Us to Mars in 2 Months

The future of space travel depends on our ability to reach celestial pit stops faster and more efficiently. As such, NASA is working with a technology development company on a new propulsion system that could drop off humans on Mars in a relatively speedy two months’ time rather than the current nine month journey required to reach the Red Planet.

NASA’s Innovative Advanced Concepts (NIAC) program recently selected six promising projects for additional funding and development, allowing them to graduate to the second stage of development. The new “science fiction-like concepts,” as described by John Nelson, NIAC program executive at NASA, include a lunar railway system and fluid-based telescopes, as well as a pulsed plasma rocket.

The potentially groundbreaking propulsion system is being developed by Arizona-based Howe Industries. To reach high velocities within a shorter period of time, the pulsed plasma rocket would use nuclear fission—the release of energy from atoms splitting apart—to generate packets of plasma for thrust.

It would essentially produce a controlled jet of plasma to help propel the rocket through space. Using the new propulsion system, and in terms of thrust, the rocket could potentially generate up to 22,481 pounds of force (100,000 Newtons) with a specific impulse (Isp) of 5,000 seconds, for remarkably high fuel efficiency.

It’s not an entirely new concept. NASA began developing its own version back in 2018 under the name Pulsed Fission-Fusion (PuFF). PuFF relied on a device commonly used to compress laboratory plasmas to high pressures for very short timescales, called z-Pinch, to produce thrust. The pulsed plasma rocket, however, is smaller, simpler, and more affordable, according to NASA .

The space agency claims that the propulsion system’s high efficiency could allow for crewed missions to Mars to be completed within two months. As it stands today with commonly used propulsion systems, a trip to Mars takes around nine months. The less time humans can spend traveling through space, the better. Shorter periods of exposure to space radiation and microgravity could help mitigate its effects on the human body.

The pulsed plasma rocket would also be capable of carrying much heavier spacecraft, which can be then equipped with shielding against galactic cosmic rays for the crew on board.

Phase 2 of NIAC is focused on assessing the neutronics of the system (how the motion of the spacecraft interacts with the plasma), designing the spacecraft, power system, and necessary subsystems, analyzing the magnetic nozzle capabilities, and determining trajectories and benefits of the pulsed plasma rocket, according to NASA.

The new propulsion system has the potential to revolutionize crewed spaceflight, helping humans make it to Mars without the toil of the trip itself.

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‘Kingdom of the Planet of the Apes’ Ending Explained: What’s Next in the New Trilogy?

By Jordan Moreau

Jordan Moreau

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SPOILER WARNING: This story contains spoilers for the ending of “ Kingdom of the Planet of the Apes ,” now playing in theaters.

A new decade means a new “Planet of the Apes” trilogy.

The “Kingdom of the Planet of the Apes” ending teases much more story to come, and director Wes Ball has already confirmed there are plans for two more sequels . At that rate, the reboot series, comprised of two trilogies, will surpass the five-movie original series, which ran from 1968 to 1973.

Popular on Variety

Producer Amanda Silver and Rick Jaffa teased the new trilogy plans to Variety .

“[There’s] always this question from the very original: Can ape and human live side by side? Is there room on the planet for more than one intelligent species?” Silver said.

Jaffa added, “And that carries through all of the movies right up to “Kingdom.” [And] we did see, in terms of this carrying forward, that if we played it right, there’d be at least three movies.”

“I do think there are still many, many years in-between when that Charlton Heston reality steps in, where a spaceship drops out of the sky onto a planet full of apes,” he said. “The connectedness of all these movies has always been a little loose, they aren’t like other franchises out there which are so absolutely carved in stone you can’t violate things – it’s always been a little loosely connected. In my mind if we had our choice, we wouldn’t go back and remake the 1968 version, we would build all the way up to it then start over, just go back and watch [the] ’68 version and the franchise through.”

And who might be the villain in the next “Apes” movie? It appears that the tyrannical ruler Proximus Caesar (Kevin Durand) falls to his watery death at the end of “Kingdom,” but can anyone really be sure? Without seeing a body, anything could happen — and Proximus would surely want to wreak vengeance on Noa and Mae for destroying his clan.

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