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Astronomers Found a Planet That Survived Its Star’s Death

When our sun enters its death throes in about five billion years, it will incinerate our planet and then dramatically collapse into a dead ember known as a white dwarf. But the fate of more distant planets, such as Jupiter or Saturn, is less clear.


On Wednesday in the journal Nature, astronomers reported observing a tantalizing preview of our solar system’s afterlife: a Jupiter-size planet orbiting a white dwarf some 6,500 light years from here.


Known as MOA-2010-BLG-477Lb, the planet occupies a comparable orbit to Jupiter. The discovery not only offers a glimpse into our cosmic future, it raises the possibility that any life on “survivor” worlds may endure the deaths of their stars.


“While there is quite a lot of evidence of rocky planetary debris orbiting around white dwarfs, we have very few data points of intact planets,” said Joshua Blackman, a postdoctoral researcher at the University of Tasmania and lead author of the study.

塔斯马尼亚大学博士后研究员、该研究的主要作者Joshua Blackman说:“虽然有相当多的证据表明,有岩石行星碎片围绕白矮星运行,但我们几乎没有完整行星的数据点。”