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Scientists Deliberate Cleaning Space Junk

Everything that we launch into an orbit around the earth eventually becomes space debris. Scientists say the increasing number of unusable objects circling our planet is threatening functioning satellites as well as humans flying into space. The European Space Agency, or ESA, plans to solve the problem.   The U.S. space agency NASA says there are half a million pieces of space debris, with more than 20,000 larger than an apple. Most are speeding along at about seven kilometers per...

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