Well, I use to ask myself why the sun today have intensity similar to 200 million years ago, if today it have less hydrogen.
Any intensity change for sunlight would change things dramactically on Earth.
Or maybe it have change or cycles that lead to ice ages.
What USA will do will the next ice age arrive???
Quote:
Originally Posted by redpoint5
I never understood why a less energetic sun would be larger. Also, why would the sun wait until it exhausted H2 before it began fusion of He? Shouldn't both processes be occurring simultaneously?
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