All Questions
3
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7
votes
3
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When a star enters a red giant phase, does the pressure in its core increase or decrease?
When a star becomes a red giant, does the pressure in its core increase or decrease?
From one side, the only source of pressure in a star is gravity. A red giant is much larger than an ordinary star, ...
- 800
3
votes
1
answer
3k
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How long does it take a star to transition from main sequence to red giant?
I have read that it takes billions of years for stars of approximately the size of the Sun to get through the main sequence, after which it will enter the red giant phase. When that happens, how long ...
- 133
4
votes
2
answers
659
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Why do post main sequence stars enter the red giants branch?
I am an early graduate student in astronomy and have hard time understanding why do post-MS stars move up the RGB.
Here is what I understand about post main sequence evolution of stars. As their ...
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