An artist’s view of a white dwarf siphoning off debris from shattered worlds in its planetary system. Courtesy NASA/ESA, Joseph Olmstead Johnson was part of a team from UCLA, UC San Diego, and the University of Kiel in Germany working to study chemical elements detected in and around the white dwarf atmosphere.
The evolution of our Sun as a dying star to become a red giant, then form a planetary nebula, and eventually end up as a white dwarf. That evolutionary process also also affects worlds and other objects in its system. Image Credit: ESO/S. Steinhofel The whole process will tear apart the solar system, ripping planets to shreds and scattering comets and asteroids. Any of those objects that come too close to the white dwarf Sun will get sucked in and destroyed. The scale of the destruction occurs fairly quickly if G238-44’s example is any clue. This study shows the shocking scale of the chaos.
“The best fit for our data was a nearly two-to-one mix of Mercury-like material and comet-like material, which is made up of ice and dust,” Johnson said. “Iron metal and nitrogen ice each suggest wildly different conditions of planetary formation. There is no known solar system object with so much of both.”The death of this sun-like star and its penchant for gobbling up debris has another interesting twist.
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