They survive by bringing all they need with them - food, air, water... etc.
The spacecraft that astronauts go up in, have their own life support systems which regulate conditions to keep the spacecraft hospitable.
No u do not need to go up into space to be an astronaut. Actually many astronauts train and train but don't get to go up in space.
shoes
They send them there so they can become awesome and well known.(:and they love it but no one has actually gone up to space its a mith..((::: hope i helpedd ya'll ..(:
Humans, Astronauts (MAYBE)
They do not. Astronauts in space are effectively weightless, so for them, there is no up or down; the idea of "upright" has no meaning.
You can. Astronauts and cosmonauts have lived in space for up to 6 months at a time.
Astronauts get in space by riding rockets that shoot them up and away from the Earth's gravitational pull.
Astronauts when they do not work, sleep, or as in the Skylab had a day for having a wash and clean up, they had radio work as well.
eat poo
astronauts use: space suits invisible braces edible toothpaste athletic shoes baby food mashed up food powdered drinks
it sometimes takes up to 12 months