Multiple Choice
A main-sequence star is defined as a star:
A) with a surface temperature equal to that of the Sun.
B) in which nuclear fusion reactions generate sufficient energy to oppose further condensation of the star.
C) whose age after birth is about 1 million years.
D) with a luminosity precisely equal to that of the Sun.
Correct Answer:
Verified
Correct Answer:
Verified
Q20: What scientific method is used to observe
Q164: What are the main general features that
Q245: The period of variability of a Cepheid
Q299: Comparing Population I and Population II stars,the
Q301: What is the SECOND most abundant element
Q302: What event occurs at the end of
Q304: The transfer of mass from the surface
Q305: What rates of mass loss from red
Q306: What fraction of the mass of a
Q308: What is the dominant nuclear reaction during