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Space 'Junk' Poses Real, Though Unlikely, Threat to Earth

The big space headlines recently have been about the asteroid 2016 QA2, how close it came to Earth and how it was discovered just a few hours before its fly-by. The media were a bit emphatic in their concern. "Earth Just Narrowly Missed Getting Hit by an Asteroid," was the headline in Popular Mechanics, and a close match for other media reaction to QA2's close shave. Perspective is important Keeping an eye on the skies isn't a new hobby. NASA has been doing it...

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