Which two parameters of star motion in the Milky Way are represented by its rotation curve?
A) Orbital speed of the stars as a function of their age
B) Orbital period of the stars as a function of their distance from the galactic center
C) Orbital speed as a function of star distance from the galactic center
D) Star position above or below the galactic plane as a function of distance from the galactic center

Question

Quizplus · Accepted Answer

The rotation curve shows the orbital speed of stars as a function of their distance from the galactic center. This parameter helps to understand the distribution of mass within the galaxy, including the presence of dark matter. The other parameters listed are not represented by the rotation curve.

Which Two Parameters of Star Motion in the Milky Way