Our favorite astrophysicist, Neil deGrasse Tyson, explains how long you’d survive on other planets in our solar system without a spacesuit (well, to be honest, in most of the planets, spacesuit won’t help you … In space there's nothing to insulate you, so eventually you'll freeze to death.

In Earth orbit, conditions can be as cold as minus 250 degrees Fahrenheit. Here they are. The residual molecules that do exist aren't enough to have much of any effect. it’s never a good idea to go into space without some kind of protection. What space is, though, is a … Long-term stays on Mars are many decades away, maybe more than 100 years. NASA's first spacesuits were made for the Mercury program. Even with an oxygen supply, you could not survive without a suit. If you were flung out for lets say 45 seconds then brought back inside and repressurized instantly, you'd survive.

Ishan Daftardar 16 Jun 2016 (Updated: 12 Dec 2019) Let’s begin by stating the obvious…. You wouldn't be happy, but you wouldn't be dead either. (That's how long it would take the body to use up the oxygen left in the blood.) We have not yet been able to live in a dome under water for more than a few weeks, even though electricity, food, and air are easily supplied from wires and pipes to the surface.

At most, an astronaut without a suit would last about 15 seconds before losing conciousness from lack of oxygen. Mars is an unpleasant place. It's 15 seconds conscious, and two minutes alive, if you're flung out into space naked with no recovering. BI Answers: How long could you survive on Mars wearing only jeans and a T-shirt? A spacesuit protects astronauts from those extreme temperatures. For all its issues and faults, Earth is a lovely place.

NASA is looking at what will be needed on spacesuits for trips to Mars. It's cold, full of deserts, and has very little oxygen or gravity. Although the surface temperature on Mars is sometimes not that bad (it can go above freezing in some places), Mars's atmosphere is incredibly thin compared to that of the Earth and a human could not survive very long in it. All in all, unless you’ve got yourself a suit like the new Z-2 that NASA hopes will one day be worn on Mars, you’re better off keeping it terrestrial. SpaceX’s Mars Plan: 2024. Unlike Earth orbit or the moon, Mars has its own atmosphere. Mercury was the first time NASA astronauts flew into space. In the sunlight, they can be as hot as 250 degrees. Mars has more gravity than the moon so the suits worn on Mars cannot be too heavy. Exploring Mars will involve new challenges.