Author Question: Stellar spectra tell us that ________ is the second most abundant element in the Sun. A) carbon ... (Read 37 times)

xclash · **on:** Jul 27, 2018

Stellar spectra tell us that ________ is the second most abundant element in the Sun.

A) carbon B) helium C) iron D) hydrogen E) oxygen

Question 2

On what basis are we sure that no quasar is lurking among the thousands of member galaxies in the Virgo Cluster, 18 Mpc distant?

What will be an ideal response?

britb2u · **Reply #1 on:** Jul 27, 2018

Answer to Question 1

B

Answer to Question 2

Quasars are far more luminous visually than normal galaxies, so at that distance, a quasar would be bright enough to see with the naked eye The distance to the closest quasar is still more than a 100 Mpc.