

The Rosette Nebula, also known as Caldwell 49, is a large, spherical, H II region located near one end of a giant molecular cloud in the Monoceros region of the Milky Way Galaxy.
Looking for a past lecture?
Watch our Video Library
The Marshal Martz Memorial Astronomical Association is a volunteer-run 501(c)(3). Every visit is free — your membership and donations keep the telescopes running and the lectures coming.
Sweet! I am going to be an astronomer when I’m older! Great! ~ From Ethan Johnson
Copyright © 2026, Martz-Kohl Observatory.