What is the density-wave model?
A) It is a way of describing the formation of Galactic spiral arms.
B) It is a model who puts on a show at astronomy meetings.
C) It is a description of how light propagates.
D) It is a theory of the origin of the Universe.

Question

Quizplus · Accepted Answer

The density-wave model is a theory that explains the formation and structure of spiral arms in galaxies, suggesting that these arms are areas of higher density that move through the galaxy, triggering star formation as they pass through.

What Is the Density-Wave Model