The recession speed of spiral galaxies may also render their colors ________ due to ________.
A) bluer; relativistic beaming
B) bluer; a Doppler-like effect
C) redder; relativistic beaming
D) redder; a Doppler-like effect
E) redder; galactic interactions

Question

Quizplus · Accepted Answer

The recession speed of spiral galaxies causes their light to be redshifted due to the Doppler effect, making them appear redder.

The Recession Speed of Spiral Galaxies May Also Render Their