What is an ionization nebula?
A)a region of very hot,low-density gas surrounding a recent supernova
B)a clump of gas that will soon give birth to a new star
C)a colorful cloud of gas that glows because it is heated by light from nearby hot stars
D)a name sometimes used to describe spiral galaxies besides the Milky Way

Question

Quizplus · Accepted Answer

An ionization nebula is a colorful cloud of gas that glows because it is heated by light from nearby hot stars. The high-energy radiation from these stars ionizes the gas in the nebula, causing it to emit light of various colors.

What Is an Ionization Nebula