Marcus Chown

@marcuschown

Writer. Books include Tweeting the Universe, We Need to Talk About Kelvin, Quantum Theory Cannot Hurt You & Solar System for iPad

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South Pole of the Moon: foreground crater, Skackleton, is in permanent shadow & may contain frozen water from comets

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622 days ago

South Pole of the Moon: foreground crater, Skackleton, is in permanent shadow & may contain frozen water from comets

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