Stars that travel in the same direction around a concentration of mass are characteristic orbits found in:
A) the arms of spiral galaxies.
B) the bulges of spiral galaxies.
C) elliptical galaxies.
D) irregular galaxies.

Question

Quizplus · Accepted Answer

The characteristic orbits described in the question are found in the arms of spiral galaxies. This is because the stars within the arms are moving together in the same direction around the concentration of mass at the galaxy's center. The other options (B, C, D) do not typically exhibit this type of orbit.

Stars That Travel in the Same Direction Around a Concentration