Multiple Choice
What is the relationship between stellar mass and position on the main sequence of the Hertzsprung-Russell diagram?
A) The most massive stars appear in the center of the main sequence while less massive main-sequence stars are brighter or dimmer than these stars as a consequence of their higher or lower temperatures.
B) The more massive the star, the higher up on the main sequence the star will appear.
C) The main sequence defines a line of stars whose masses are about 1 Mε , while stars of different masses appear on either side of the main sequence.
D) The less massive the star, the higher up on the main sequence the star will appear.
Correct Answer:

Verified
Correct Answer:
Verified
Q2: Some protostars, when they evolve onto the
Q3: When a carbon monoxide (CO) molecule emits
Q4: Suppose the light leaving a star has
Q5: How long does it take for a
Q6: What is the difference between a giant
Q8: What is a proplyd?<br>A)a protoplanetary disk around
Q9: How does a 15-M ? star evolve
Q10: Some protostars, when they evolve onto the
Q11: The pillars of M16, shown in Figure
Q12: A particular giant molecular cloud has a