NGC 7635, also known as the Bubble Nebula, Sharpless 162, or Caldwell 11, is an H II region[1] emission nebula in the constellation Cassiopeia. It lies close to the open cluster Messier 52. The "bubble" is created by the stellar wind from a massive hot, 8.7[1] magnitude young central star, SAO 20575 (BD+60°2522).[7] 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.[7] It was discovered in November 1787 by William Herschel.[5] The star BD+60°2522 is thought to have a mass of about 44 M☉.
^ abcdefSIMBAD 2007.
^ abHubbleSite 2000.
^Nemiroff & Bonnell 2004.
^ abNemiroff & Bonnell 2006.
^ ab"NGC-IC Project Database". Archived from the original on 2001-09-04. Retrieved 2008-12-15.
NGC 7635, also known as the BubbleNebula, Sharpless 162, or Caldwell 11, is an H II region emission nebula in the constellation Cassiopeia. It lies close...
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61 M1-92 NGC 6826 NGC 6881 NGC 6884 NGC 7008 NGC 7026 NGC 7027 NGC 7048 Soap BubbleNebula WR Crescent Nebula SNR Cygnus Loop (including Veil Nebula)...
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