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・ NGC 2506
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・ NGC 1410
・ NGC 1427
・ NGC 1427A
・ NGC 1433
・ NGC 1435
・ NGC 145
・ NGC 147
・ NGC 1483
・ NGC 15
・ NGC 1501
・ NGC 1502
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・ NGC 1512
NGC 1514
・ NGC 1528
・ NGC 1531
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・ NGC 1545
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NGC 1514 : ウィキペディア英語版
NGC 1514

NGC 1514 is a planetary nebula that was discovered by William Herschel on November 13, 1790, describing it "A most singular phaenomenon" and forcing him to rethink his ideas on the construction of the heavens. Up until this point Herschel was convinced that all nebulae consisted of masses of stars too remote to resolve, but now here was a single star "surrounded with a faintly luminous atmosphere." He went on to conclude "Our judgement I may venture to say, will be, that the nebulosity about the star is not of a starry nature".
It has since been conjectured that the nebula in fact envelops a tightly orbiting double star with a period of up to 10 days. Gas is presumably expanding away from the larger star of the pair.
NGC 1514 is also known as Crystal Ball Nebula.
== Notes ==


  1. Parallax = 5.40 ± 1.70 mas〔



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「NGC 1514」の詳細全文を読む



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