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This is Scientific American 60-Second Space. I'm Clara Moskowitz. Got a minute?
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Most supernovae are caused by stars collapsing at the end of their lives to create black holes or dense neutron stars.
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But those outcomes are apparently not true for two recently found supernovae that are much farther away and brighter than almost any star explosion ever seen.
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Astronomers were initially mystified.
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But a new study posits that the oddball supernovae may have ended up as highly magnetic, rapidly spinning objects called magnetars.
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A magnetar can rotate as fast as the blades of a kitchen blender.
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The huge amount of energy tied up in their spin could then be released in a torrent that would make them shine 100 times brighter than a normal supernova.
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A project called the Supernova Legacy Survey discovered the objects.
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They belong to a newly designated class called superluminous supernovae,
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which account for just one in every 10,000 supernovae.
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Yet their extreme brilliance means we can see them from much farther away than usual.
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For instance, one is about 10 billion light-years away and dates from the very early universe.
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So in a way, this discovery is really old news.
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Thanks for the minute, for Scientific American 60-Second Space. I'm Clara Moskowitz.
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显示原文 =This is Scientific American 60-Second Space. I'm Clara Moskowitz. Got a minute?
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显示原文 =Most supernovae are caused by stars collapsing at the end of their lives to create black holes or dense neutron stars.
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显示原文 =But those outcomes are apparently not true for two recently found supernovae that are much farther away and brighter than almost any star explosion ever seen.
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4 / 14
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显示原文 =Astronomers were initially mystified.
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5 / 14
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显示原文 =But a new study posits that the oddball supernovae may have ended up as highly magnetic, rapidly spinning objects called magnetars.
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显示原文 =A magnetar can rotate as fast as the blades of a kitchen blender.
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显示原文 =The huge amount of energy tied up in their spin could then be released in a torrent that would make them shine 100 times brighter than a normal supernova.
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显示原文 =A project called the Supernova Legacy Survey discovered the objects.
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显示原文 =They belong to a newly designated class called superluminous supernovae,
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显示原文 =which account for just one in every 10,000 supernovae.
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11 / 14
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显示原文 =Yet their extreme brilliance means we can see them from much farther away than usual.
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显示原文 =For instance, one is about 10 billion light-years away and dates from the very early universe.
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显示原文 =So in a way, this discovery is really old news.
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显示原文 =Thanks for the minute, for Scientific American 60-Second Space. I'm Clara Moskowitz.
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- 单句循环：关
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