Bubble Nebula
Emission nebula in the constellation Cassiopeia / From Wikipedia, the free encyclopedia
Dear Wikiwand AI, let's keep it short by simply answering these key questions:
Can you list the top facts and stats about Bubble Nebula?
Summarize this article for a 10 year old
SHOW ALL QUESTIONS
For the Bubble Nebula in Barnard's Galaxy, see Bubble Nebula (NGC 6822).
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☉.
Quick Facts Emission nebula, Observation data: J2000 epoch ...
Emission nebula | |
---|---|
H II region | |
Observation data: J2000 epoch | |
Right ascension | 23h 20m 48.3s[1] |
Declination | +61° 12′ 06″[1] |
Distance | 7100[2] to 11000[3][4] ly (3,400 pc) |
Apparent magnitude (V) | ~10[5] |
Apparent dimensions (V) | 15′ × 8′[6] |
Constellation | Cassiopeia |
Physical characteristics | |
Radius | 3[2] to 5[7][4] ly |
Notable features | Shell around SAO 20575[1] |
Designations | Bubble Nebula[1] Sharpless 162 (Sh2-162) Caldwell 11 |
See also: Lists of nebulae |
Close