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It is estimated that hundreds of millions of pieces of space trash are now floating through our region of the solar system. Some of them are as large as trucks while others are smaller than a flake of paint. There are a couple of relatively famous pieces of space trash. One is the glove that floated away from the Gemini 4 crew during the first spacewalk by U.S. astronauts. Rocket boosters, pieces that came loose from spacecraft, and fragments and particles created by space collisions or explosions are other examples of the types of trash whizzing around Earth at speeds of up to 36,000 km per hour.