In the analogy where the Sun's 11-billion-year life is compressed into 80 years, how long is the entire red giant evolution compressed into?
Answer
7 to 8 years
When the Sun's total life (10 billion years MS + 1 billion years RG) is condensed into an 80-year human lifetime, the 1-billion-year red giant phase compresses to about 7 to 8 years.
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