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4U 0142+61 is a magnetar at an approximate distance of from Earth, located in the constellation Cassiopeia. In an article published in ''Nature'' on April 6, 2006, Deepto Chakrabarty ''et al.'' of MIT revealed that a circumstellar disk was discovered around the pulsar. This may prove that pulsar planets are common around neutron stars. The debris disk is likely to be composed of mainly heavier metals. The star had undergone a supernova event approximately 100,000 years ago. The disk orbits about 1.6 million kilometers away from the pulsar and probably contains about 10 Earth-masses of material. ==References== * ( Scientists crack mystery of planet formation ) (April 5, 2006) CNN * (Spitzer Sees New Planet Disk Around Dead Star ) (April 7, 2006) SpaceDaily * (Birth of 'Phoenix' Planets? ) * (4U0142+61 ) * (1RXS J014621.5+614509 ) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「4U 0142+61」の詳細全文を読む スポンサード リンク
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