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Abell 33
Abell 33 is a planetary nebula located 2700 light years away in the constellation of Hydra. It is lies very close to its neighboring star HD 83535. The 'diamond ring' appearance is caused by a foreground star which is not part of the nebula. ==References==
*http://www.caelumobservatory.com/gallery/abell33.shtml *http://www.skyhound.com/observing/archives/mar/A_33.html
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「Abell 33」の詳細全文を読む
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