Answer :
Asteroids are so widely apart that the spacecraft can simply fly through them, thus they aren't. astronaut asteroid.
What materials make up asteroids?
They are black in colour and most likely made of silicate and clay rocks. They are some of the solar system's oldest objects. Nickel-iron alloys and silicate minerals make up the S-types ("stony"). Metal makes up the M-types (nickel-iron).
Can we survive on a asteroids?
Nothing inherently prevents life from existing on an asteroid.
According to one idea, the first signs of life on Earth appeared in small water-filled holes in rocks buried deep within the earth's crust.
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