Space trash, or space debris, is the product of human space activities, including rocket arrows and satellite bodies that complete tasks, rocket ejections, discards during space missions, and fragments generated by collisions between space objects. The main source of pollution of the space environment. Space garbage is. ['Falling paint particles from spacecraft.', 'Dust from the explosion of the space shuttle Challenger after 72 seconds.', 'Dust formed by residues from the Milky Way\'s youngest supernova "Cassiopeia-α" explosion.', 'Rocket booster that fell into the atmosphere after the space shuttle took off.']