description Sh2-162 Overview
Sh2-162, formally cataloged as NGC 7635 and commonly known as the Bubble Nebula, is an emission nebula located in the constellation Cassiopeia. It was discovered by astronomer William Herschel in 1787. The nebula is an H II region shaped by the intense stellar wind radiating from the massive O-type star designated BD+60 2522. This central star's radiation ionizes the surrounding gas, causing it to glow and form the structure's distinctive spherical shell.
help Sh2-162 FAQ
What are the other names for Sh2-162?
Sh2-162 is formally cataloged as NGC 7635 and is widely known as the Bubble Nebula. It is located in the constellation Cassiopeia.
Why does the Bubble Nebula have a bubble shape?
The shape is produced by the intense stellar wind from a massive hot star pushing into surrounding gas. The resulting shell of ionized material gives the nebula its rounded appearance.
Who discovered the Bubble Nebula?
The object was discovered by William Herschel in 1787. Modern catalogs use designations such as NGC 7635 and Sh2-162 to identify it.
Is the Bubble Nebula a galaxy?
No. Sh2-162 is an emission nebula, specifically an H II region inside the Milky Way. Its glowing gas is associated with the effects of a massive young star rather than a separate galaxy.
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