Wednesday, January 03, 2018

Month of HZD: Moonlight is secondhand sunlight

Have you ever thought about how weird that is? Even when the Sun is hidden from view by the planet, the Moon is reflecting the Sun's light at you. And even on nights when there's a new moon and the sun's light is unable to reach you via that route, it's still getting to you, albeit in much smaller amounts, by reflecting off other planets.

And the Sun is so far from the Earth that its light takes eight and a half minutes just to get here without reflecting off anything else. So, if the Sun were to suddenly turn green, we wouldn't even know it for the first eight and a half minutes. People would be like, "The Sun's green!" And I'd be all, "Yeah, that's old news."


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