Encyclopedia Article


The plural form of the word nebula. Nebulae are interstellar clouds of gas and dust that exist outside the solar system. There are two kinds of nebulae: extragalactic nebulae, a huge collection of stars and dust or galaxies, and galactic nebulae, made of interstellar medium or a cloud of dust that exists between stars.

Photo Credit: 

"Orion's Nebula (M42), January 25, 2009" by astrorom is licensed under CC BY-NC-ND.