Messier 99
Messier 99 (also known as M99 or NGC 4254) is an unbarred spiral galaxy approximately 50 million light-years away[3] in the constellation Coma Berenices.
HGS Session References
HGS Sessions - Clearing Boulder, Colorado - 4/2/2015 [1]
References
- ↑ HGS Session
Found in HGS Manual on Page 108
Found in HGS Manual on Page 115.