Wouldn't this account for gloal warming?
20 Things You Didn't Know About ... the Summer Solstice
Why Galileo wasn't in a partying mood during the 1633 solstice, and more
By Dean Christopher
Provided by Discover Magazine
18. And the Sun keeps getting brighter. Models of stellar evolution estimate that the Sun is about 40 percent more luminous today than it was when the Earth formed 4.5 billion years ago.
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