Observations of the shift toward the red in stellar absorption spectra for stars in galaxies outside out own implies that
A) objects observed in the light of these stars will appear more blue than red.
B) these stars are part of a rapidly spinning galaxy.
C) these stars are headed toward us.
D) these stars are receding away from us.

Question

Quizplus · Accepted Answer

The shift toward the red in stellar absorption spectra is known as redshift, which occurs when an object is moving away from us. This implies that the stars in galaxies outside our own are receding away from us.

Observations of the Shift Toward the Red in Stellar Absorption