Author Question: In general, what can be said about type O and B stars compared to type K and M stars? A) They are ... (Read 20 times)

jhjkgdfhk · **on:** Jul 27, 2018

In general, what can be said about type O and B stars compared to type K and M stars?

A) They are hotter and younger.
B) They are cooler and older.
C) They are cooler and younger.
D) They are hotter and older.
E) They are neither hotter nor cooler, younger nor older.

Question 2

________ optics greatly reduces the effect of atmospheric turbulence by deforming the shape of the mirror by computer control.

Fill in the blank(s) with correct word