What is needed on earth
What are the characteristics that allow life in the solar system?
Proximity to the sun is necessary for sustainable life on earth.
In order for the astronauts to get to space they need a spacecraft to get out of earth's atmosphere. They also need to wear their spacesuits.
You need food and even though it might not be what you eat everyday, you still have to eat and it is usually dried to last longer.
Astronauts have to exercise in order to keep their bones healthy and be able to return to earth.
Now don't forget that not everything is easy in space and going to the bathroom is one of them. Don't forget that it is zero gravity in the spacecraft.
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