NASA: Space rock that hit Russia was an asteroid

02/18/2013 | Los Angeles Times (tiered subscription model)

The space rock that exploded over central Russia last week was actually a 45-foot, 10,000-ton asteroid, NASA officials announced. Scientists believe the object originated from the asteroid belt between Mars and Jupiter. The rock, which vaporized about 15 miles above the planet, caused a massive shock wave with a force equivalent to a nuclear bomb.

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