The figure below shows the spectrum of a star (top)whose motion compared to our star is nearly stationary within the Milky Way Galaxy.The galaxy spectrum (bottom)indicates that the galaxy is
A) moving toward us.
B) moving away from us.
C) stationary.
D) There is not enough information.

Question

The figure below shows the spectrum of a star (top)whose motion compared to our star is nearly stationary within the Milky Way Galaxy.The galaxy spectrum (bottom)indicates that the galaxy is 
A) moving toward us. 
B) moving away from us. 
C) stationary. 
D) There is not enough information.

Quizplus · Accepted Answer

The galaxy spectrum shows a redshift, indicating that it is moving away from us. Therefore, the star's spectrum would also show a redshift if it were moving away from us, but since it is nearly stationary in relation to our star, its spectrum does not show any significant shift.

The Figure Below Shows the Spectrum of a Star (Top)whose