Space Junk Cleanup Needed, NASA Experts Warn

Stefan Lovgren

for National Geographic News

Space is filling up with trash, and it's time to clean it up, NASA experts warn.A growing amount of human-made debris—from rocket stages and obsolete satellites to blown-off hatches and insulation—is circling the Earth. Scientists say the orbital debris, better known as space junk, poses an increasing threat to space activities, including robotic missions and human space flight. "This is a growing environmental problem," said Nicholas Johnson, the chief scientist and program manager for orbital debris at NASA in Houston, Texas. Johnson and his team have devised a computer model capable of simulating past and future amounts of space junk. The model predicts that even without future rocket or satellite launches, the amount of debris in low orbit around Earth will remain steady through 2055, after which it will increase.

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