Neil deGrasse Tyson

@neiltyson ↗

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Last Checked Dec. 22, 2019

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Fri Jul 19 19:46:00 +0000 2019

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Neil deGrasse Tyson @neiltyson

Earth is 81x the Moon’s mass but only 16x its volume. With our large, iron-metal core, we are much denser. The Moon, forged entirely from our Crust & Mantle, has hardly any Iron. https://t.co/n9YtoYsILV — PolitiTweet.org

Posted July 19, 2019

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Neil deGrasse Tyson @neiltyson

Scary Times: A Mars-sized protoplanet in the early solar system sideswiped Earth, blasting parts of Earth’s crust & mantle into space, creating a ring of orbiting molten rock, which rapidly coalesced to form our Moon. https://t.co/mZOErcyth7 — PolitiTweet.org

Posted July 19, 2019

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Neil deGrasse Tyson @neiltyson

FYI: We measure the Moon’s distance with exquisite accuracy using Lasers & Telescopes combined with Moon-based mirrors placed there by Neil Armstrong during Apollo 11. https://t.co/YQzrboqf9y — PolitiTweet.org

Posted July 19, 2019