Astronomers who discovered quasars found that they show ___________ of their spectral lines and are thus probably much ___________ than nearby galaxies.
A)large redshifts; farther away
B)large blueshifts; farther away
C)no wavelength difference; nearer
D)large redshifts; nearer
E)large blueshift; nearer

Question

Quizplus · Accepted Answer

Astronomers found that quasars show large redshifts in their spectral lines. This means that the wavelengths of light emitted by quasars are shifted towards longer, or redder, wavelengths. This is a result of the Doppler effect, which occurs when an object is moving away from us. The greater the redshift, the farther away the object is. Therefore, quasars are probably much farther away than nearby galaxies.

Astronomers Who Discovered Quasars Found That They Show ___________ of Their