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Astronomy and Cosmology
Astronomy and Astrophysics
Questions about the lifespan of the Earth
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[QUOTE="|Glitch|, post: 5442988, member: 494152"] Your "wild guess" is correct. As the sun ages it gets brighter (luminosity increases). As the sun gets brighter, it also gets hotter. In another 500 million years the sun will be 10% more luminous than it is currently. That is sufficient to kill off all complex life on the planet and boil off the oceans. The only life that might exist after that point would be extremophiles. So not only is our sun approximately midway through its lifespan, but complex life on this planet (which began ≈540 million years ago) is also approximately midway through its existence. Assuming something else does not terminate all life before then. [/QUOTE]
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Questions about the lifespan of the Earth
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