This planet survived expansion and death of its host star
WASHINGTON - The first rocky planet ever spotted orbiting a burned out star called a white dwarf offers a glimpse of what may be in store for Earth billions of years from now - showing it is possible our planet might survive the death of the sun, albeit as a cold and desolate outpost in space .
It originally orbited at about the same distance as Earth is to the sun. Following its star's demise, it is at 2.1 times that distance. Astronomers have debated whether Earth - the third planet from the sun, with Venus the second and Mars the fourth - would be engulfed and destroyed when the sun expands during its red giant phase, estimated to occur seven billion years from now. It will become a white dwarf a billion years after that.
Until now, only gas-giant planets larger than Jupiter, our solar system's biggest planet, had been spotted orbiting white dwarfs.
Earth White Dwarf Milky Way Galaxy Science
پاکستان تازہ ترین خبریں, پاکستان عنوانات
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