Astronomy Red
Posted September 28, 2010
By admin
How long is a high mass star in the red supergiant stage?
I need this for an astronomy PROJECT!
A rule of thumb is that the Giant stages have a duration that is about 10% of the Main Sequence time for the same star.
So a star with a mass of 20 M_Sun, will be in the Main Sequence stage about 20 million years and will go through the Supergiants stages in about 2 million years.
Celebrating astronomy professor Yervant Terzian
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