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This is Scientific American's 60-Second Space. I'm John Matson. Got a minute?

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Last week we told you about the end of an era:

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NASA ended the Kepler spacecraft's exoplanet-hunting mission, following an irreparable mechanical failure.

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This week, news of rebirth.

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NASA's WISE satellite is a space telescope that carefully surveyed the universe in infrared light.

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In 2010 it ran out of the cryogenic coolant that enabled its primary mission of mapping the skies.

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But WISE still found work, scanning for asteroids near Earth.

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Finally in 2011 NASA put the orbiting observatory into hibernation.

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Now NASA is planning to reboot WISE to find more asteroids.

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The space agency will fire it up in September for a three-year run.

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WISE should be able to find some 150 new near-Earth asteroids and get a better handle on another 2,000.

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Altogether more than 10,000 near-Earth asteroids, and almost 100 near-Earth comets, have been discovered by astronomers.

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That census includes most of the really big ones, but the vast majority of smaller asteroids remain to be discovered.

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As we saw in February, when a small asteroid exploded over Russia, breaking windows in thousands of buildings, even the little ones can still do big damage.

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Thanks for the minute, for Scientific American's 60-Second Space.I'm John Matson.

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