Celestial Objects
Caldwell 22
Nebulae
Citation Formats
General Reference
APA Style
BibTeX
Caldwell 22, also known as the Blue Snowball Nebula or NGC 7662, is a planetary nebula in the constellation Andromeda, discovered by William Herschel in 1784. It lies roughly 5,000 to 6,000 light-years from Earth and appears as a small, round, distinctly blue-green disk in a telescope, the source of its popular nickname.
Reader Challenges (0 open reader challenges)
No disputes yet. Spotted an error or a better source? Open the first one.
Sign in to dispute this or suggest a correction.
View At A Past Year
The atlas records no dated fact of its own for this entry, so there is no other year to choose.