Author Question: As a solar mass protostar moves on to the main sequence, A) its surface temperature and ... (Read 71 times)

imowrer · **on:** Jul 27, 2018

As a solar mass protostar moves on to the main sequence,

A) its surface temperature and luminosity remain the same.
B) its surface temperature and luminosity decrease.
C) its surface temperature and luminosity increase.
D) its surface temperature decreases and its luminosity increases.
E) its surface temperature increases and its luminosity decreases.

Question 2

What are the two primary methods by which planets have been found around other stars in our galaxy?

I) Direct images in visible and infrared light
II) Indirectly by detecting the motion of the host star
III) Indirectly by measuring the drop in brightness of the host star when the planet crosses our line of sight
A) I and II B) II and III C) I and III