1. Stars of which color have the highest surface temperature?
A. Red
B. Orange
C. Yellow
D. Blue
2. Stellar distances are usually expresses in what units?
A. Miles
B. Kilometers
C. Light-Years
D. None of the above
3. The measure of a stars brightness is called its ___.
A. Magnitude
B. Parallax
C. Intensity
D. Color index