Which of the following describes a void?
A) a gap between spiral arms in a spiral galaxy
B) a gap in a protoplanetary disk
C) a region of the interstellar medium cleared of material by supernovas
D) a region 10-100 Mpc across where the galaxy density is very low

Question

Quizplus · Accepted Answer

A void refers to a region in the universe where the galaxy density is very low. It is typically defined as a region that is 10-100 Mpc (megaparsec) across. Voids are thought to be formed due to the gravitational pull of denser regions pulling matter away from the void.

Which of the Following Describes a Void