Many Names Used by Astronomers Are Misleading or Outdated

Multiple Choice

Many names used by astronomers are misleading or outdated. A good example is the term planetary nebula, which astronomers use to refer to:

A) a solar system in formation
B) the remains of an exploded high-mass star
C) a region of gas and dust where new planets have recently formed
D) the shell let go by a dying low-mass star
E) a globular cluster, which looks like a planet through very small telescopes