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No air, and high extremes of temperature. But beware, some microbes might be able to withstand that.
Asteriods are composed of rock that broke off of other planets.
Asteriods are made up of rocks, dust,and minerals that float in spaces atmosphere.
planetoids
asteriods and comets are different because when asteriods hit earth we are going to to have destroyed buildings and places on eath and comets are like particles in the galaxy and its when they destroy planets and make them into a different shape or sized in the galaxy.
Hunks of rock
hundreds of thousands
The asteroid belt which is between Jupiter and mars.
If you ever been in space, there are many asteriods.
Stars or asteriods
No you do not need to include the asteriods and stars because asteriods move at a constant speed and you cant figure out where to put them in the right spot. Stars maybe easier or they ma not be.
most asteroids come from between the mars and Jupiter belt.