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Astronomy: The rock that fell to Earth

When an asteroid was spotted heading towards our planet last October, researchers rushed to document a cosmic impact from start to finish for the first time. Roberta Kwok tells the tale.

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Roberta Kwok is a news intern in Nature 's Washington DC office.

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NASA Near Earth Object Program

Catalina Sky Survey

JPL's account of the event

Peter Jenniskens' homepage

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Kwok, R. Astronomy: The rock that fell to Earth. Nature 458, 401–403 (2009).

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