https://www.space.com/milky-way-journey-earth-geology-comets
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Earth's perilous journey through the Milky Way's spiral may shape the planet's geology - Space.com
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9/6/22 at 4:00pm
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Space.com
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Robert Lea
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38 words
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Science Astronomy Earth Milky Way Lunar Outpost
Every 200 million years, high-energy comets may pelt our planet as it passes through our galaxy's spiral arms.
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