翻訳と辞書
Words near each other
・ NGC 7354
・ NGC 7380
・ NGC 74
・ NGC 7424
・ NGC 7459
・ NGC 7479
・ NGC 7499
・ NGC 75
・ NGC 7510
・ NGC 752
・ NGC 7522
・ NGC 7537
・ NGC 7538
・ NGC 76
・ NGC 7600
NGC 7635
・ NGC 7662
・ NGC 7673
・ NGC 7686
・ NGC 77
・ NGC 7714
・ NGC 772
・ NGC 7727
・ NGC 7742
・ NGC 7752 and NGC 7753
・ NGC 7759
・ NGC 7777
・ NGC 7789
・ NGC 7790
・ NGC 7793


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NGC 7635 : ウィキペディア英語版
NGC 7635

NGC 7635, also called the Bubble Nebula, Sharpless 162, or Caldwell 11, is a H II region emission nebula in the constellation Cassiopeia. It lies close to the direction of the open cluster Messier 52. The "bubble" is created by the stellar wind from a massive hot, 8.7 magnitude young central star, the 15 ± SAO 20575 (BD+60 2522). The nebula is near a giant molecular cloud which contains the expansion of the bubble nebula while itself being excited by the hot central star, causing it to glow. It was discovered in 1787 by William Herschel.〔 The star SAO 20575 or BD+602522 is thought to have a mass of 10-40 Solar masses.
== Amateur observation ==
With an 8 or telescope, the nebula is visible as an extremely faint and large shell around the star. The nearby 7th magnitude star on the west hinders observation, but one can view the nebula using averted vision. Using a 16 to scope, one can see that the faint nebula is irregular, being elongated in the north south direction.

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 7635」の詳細全文を読む



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