What is a planetary nebula?
A)gas created from the remains of planets that once orbited a dead star
B)gas ejected from a low- mass star in the final stage of its life
C)the remains of a high- mass star that has exploded
D)interstellar gas from which planets are likely to form in the not- too- distant future

Question

Quizplus · Accepted Answer

A planetary nebula is formed from gas ejected from a low-mass star in the final stage of its life. As the star runs out of fuel, it begins to shed its outer layers, which illuminate and ionize the surrounding gas, forming a colorful shell-like structure. The name "planetary" is actually a misnomer, as early astronomers mistook these objects for planets due to their round, disc-like appearance in telescopes.

What Is a Planetary Nebula