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WD 1145+017
WD 1145+017〔 (EPIC 201563164〔) is a white dwarf star. It is the first white dwarf to be observed with a transiting planetological object. The supposed planetessimal, WD 1145+017 b,〔 with a 4.5 hour orbit, is being ripped apart by the star and a remnant of the former planetary system that the star hosted before becoming a white dwarf. It is the first observation of a planetological object being shredded by a white dwarf. Several other large pieces have been seen in orbit as well. All the various larger pieces have orbits of 4.5 to 4.9 hours. Rocky material is raining down onto the star, and showing up in the star's spectrum. The system was detected by the Kepler space telescope in its extended ''K2'' mission. Though the system was not a target of interest, it was within the field of view of observing sessions, and analysis of the observed data revealed the system.
== References ==
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抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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