Emission nebulae

Emission nebulae are clouds of gas that are excited to light by nearby young, hot stars. Such stars radiate much of the light in ultraviolet band. Such high energy photons cause ionization of the thin gas, and depending on molecular cloud composition, then emit lights of various wavelengths (colors). Most common element in emission nebulae is hydrogen.

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.