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17 Things You Should Know Before Going To Mars

It's hard out there for a human.

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Mars One is a mission aiming to put humans on Mars. The catch is it won't be bringing them back.


200,000 people have already applied to go, and 1058 of those remain in the application process right now. Mars One says a group of four "marsonauts" will go first, with a planned landing in 2025, but they'll be followed by more groups at two year intervals.

Here's what someone you should know before considering taking a similar trip.

1. It's going to take a long time to get there and the journey might not be very fun.

Bryan Versteeg / Mars One

Mars One say the first crew's journey will take 210 days. During this time the crew will each have 20m3 of living space each, and won't be able to shower.

If you struggle to cope with your family over Christmas, how would you cope with 30 weeks in such tight living quarters?


2. Like, really not fun.

ESA / Via

When would-be astronauts spent 520 days in a fake spaceship in a Russian car park to simulate a round trip to Mars, four of the six crew had trouble sleeping or developed depression during the mission.

One crew member had such chronic sleep deprivation that he accounted for the majority of errors in concentration and alertness tests all crew undertook.

3. Humans have never been in space for that long before.


Astronauts at the moment are limited to spending six months at a time on the International Space Station, because of the way microgravity affects their bodies. A journey to Mars would take at least 200 days, which is over half a year.

So biological problems we've seen already, like muscle and bone loss, might get worse.

5. You'll barely be able to see the Earth anymore, which might affect you more than you anticipate.


When Apollo astronauts went to the moon, they reported feeling disconcerted the further they got from Earth. Compared to Mars, the moon isn't even that far away.


6. Once your body has adapted to Martian gravity you won't be able to come back to Earth. Ever.

NASA / Getty Images

Gravity on Mars is just a third of what it is on Earth. Your bone and muscle would deteriorate and after a while your body wouldn't be able to cope with normal Earth conditions anymore.

It's the same reason astronauts struggle for a while when they come back from six months in low Earth orbit.

7. The first Martian settlers won't be able to have children.

You can decide whether that's a good or bad thing, but Mars One will advise the first people to live on Mars "not to attempt to have children" because of a lack of research into conception and whether a fetus can grow normally in reduced gravity.


11. You'll never go outside again.

NASA/JPL-Caltech/Univ. of Arizona / Via

The atmosphere on Mars is very thin (about 1% the density of Earth's). It's also 96% carbon dioxide, with only a trace of oxygen.

There are huge, huge dust storms, too. They can get going in hours but envelop the planet for days at a time. And the dust could be toxic to humans.

You'll be able to go out in your spacesuit, but that's not really the same.

13. Which also means you won't really be able to use the internet.


Apart from a select few sites that are downloaded especially to the Mars webserver from Earth. Mars One says that the marsonauts will have access to their favourite websites this way, but won't be able to surf the wider web.


15. You'll also be exposed to really quite high levels of radiation.

NASA / Via

When the Curiosity rover took its 360 day trip to Mars, scientists measured the amount of radiation it was exposed to so they could work out how much radiation humans would be exposed to on the same trip.

The total was 662 (plus or minus 108) millisieverts. That's about two thirds the lifetime limit on radiation exposure of 1,000 millisieverts imposed by most space agencies on their astronauts.

And because Mars doesn't have a magnetic field protecting it like Earth does, you'd be exposed to more radiation every time you go out on to the surface.

16. Just to reiterate: you will die on Mars, away from all other humans.


Plenty of medical conditions won't be treatable on the red planet. Even if they were, you'd still die millions of miles away from all of your friends and family.

Or it might not. You'll really only know once you get there, and by then it'll be too late. Safe trip!