Multiple Choice
During short-lived bursts called thermal pulses,stars begin their
A) planetary nebula phase.
B) red-giant phase.
C) asymptotic giant branch phase.
D) main-sequence phase.
Correct Answer:

Verified
Correct Answer:
Verified
Related Questions
Q70: When does the helium flash occur?<br>A) When
Q71: When an average-sized star reaches the end
Q72: Over time,the turnoff point (the upper end
Q73: The stars that have the longest lifetimes
Q74: How is gas distributed in interstellar space?<br>A)
Q76: The most likely places in which stars
Q77: Why does helium fusion require much higher
Q78: Stars in a second red-giant phase are<br>A)
Q79: The stellar remnant left at the end
Q80: What is the most abundant element in