I think astronauts need to be brave, smart, and cooperative. They need to be brave because they need to do dangerous tasks like spacewalking. They need to be smart to operate and fix complex machinery on their voyage. Astronauts are required to cooperate because there is too much work for one person to do.
The astronauts should leave a rover for future astronauts. It would have a capsule that runs on solar power and can launch itself back to Earth. It should have a claw for gathering big rocks and a vacuum for collecting small rocks and dust.
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