1. On what grounds are astronomers able to say that the Sun has about 5 billion years remaining in its mainsequence stage? 2. What will happen inside the Sun 5 billion years from now when it begins to...


1. On what grounds are astronomers able to say that the Sun has about 5 billion years remaining in its mainsequence stage?


2. What will happen inside the Sun 5 billion years from now when it begins to evolve into a giant?


3. How is the evolution of a main-sequence star with less than 0.4 M fundamentally different from that of a main-sequence star with more than 0.4M?



May 07, 2022
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