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 energy from these stars ionizes the gas molecules, causing them to emit light at different wavelengths and creating the distinctive colors of the nebula. Examples include the Orion Nebula and the Eagle Nebula.

What Is an Ionization Nebula