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+ - Chelyabinsk-sized asteroid impacts may be more common than we thought

Submitted by The Bad Astronomer
The Bad Astronomer (563217) writes "Using data from the Feb. 15, 2013 asteroid impact over Russia, scientists have determined that we may be hit by objects in this size range (10 — 50 meters across) more often than we previously thought, something like once every 20 years. They also found the Chelyabinsk asteroid was likely a single rock about 19 meters (60 feet) across, had a mass of 12,000 tons, and was criss-crossed with internal fractures which aided in its breakup as it rammed through the Earth's atmosphere."
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Chelyabinsk-sized asteroid impacts may be more common than we thought

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