Nebulas To comply with the US Copyright Office, section 107, all of my Pinterest boards and pins are for "criticism, comment, news reporting, teaching…
a Wolf ~ Rayet nebula is a nebula which surrounds a Wolf ~ Rayet star which is [often referred to as WR stars] a heterogeneous set of stars with unusual spectra showing prominent broad emission lines of highly ionised helium & nitrogen or carbon + the spectra indicate very high surface temperatures of 30,000 K to around 200,000 K, surface enhancement of heavy elements, strong stellar winds
The Rosette Nebula (also known as Caldwell 49) is a large, circular H II region located near one end of a giant molecular cloud in the Monoceros region of the Milky Way Galaxy. The open cluster NGC 2244 (Caldwell 50) is closely associated with the nebulosity, the stars of the cluster having been formed from the nebula's matter.
The famous Cat’s Eye nebula. "That stunning image is from the 2.5 meter Isaac Newton Telescope on the island of La Palma in the Canaries. The halo around the bright inner region is actually huge expanding shell of material centered on the nebula’s central star. And I do mean huge; that halo is nearly 6 light years across — 60 trillion km, or almost 40 trillion miles!" - Phil Plait