What is a planetary nebula?
A) a planet surrounded by a glowing shell of gas
B) the disk of gas and dust surrounding a young star that will soon form a star system
C) the ejected envelope of a giant star surrounding the remnant of a star
D) a type of young, medium-mass star
E) leftover gas from a supernova explosion

Question

Quizplus · Accepted Answer

A planetary nebula is the ejected envelope of a giant star surrounding the remnant of a star, typically formed when a star has exhausted the fuel in its core and sheds its outer layers.

What Is a Planetary Nebula