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

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As Dr.Soran, the bad guy in the movie Star Trek: Generations, found out, blowing up a star sometimes takes a few tries.

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Such was also the case for an object called SN 2009ip.

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It's a star in a galaxy about 80 million light-years away.

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Or, rather, it was a star.

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It first drew attention in 2009, when it flared up brightly in an apparent supernova—a star exploding at the end of its life.

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But it was soon unmasked as a supernova impostor--a nonfatal outburst from a massive star that only looks like a full-blown supernova.

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Following two subsequent flare-ups, astronomers have now concluded that SN 2009ip has gone supernova at last.

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During a 2012 outburst, the star brightened much more than usual, becoming a billion times as luminous as the sun.

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And spectroscopic observations revealed that gas was racing outward at roughly 8,000 kilometers per second.

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Speeds that high indicate a cataclysmic explosion triggered by the collapse of the star's core.

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The research will appear in the Monthly Notices of the Royal Astronomical Society.

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Astronomers now have the rare opportunity to study details of a supernova--both before and after.

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

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