title text: I mean, it's pretty, but it doesn't really affect us beyond that. Except that half the nights aren't really dark, and once or twice a day it makes the oceans flood the coasts.
(https://xkcd.com/2809)
(https://www.explainxkcd.com/wiki/index.php/2809)
"You have got only ONE?! What happened to the others?"
In science fiction movies it looks like every habitable planet has multiple moons, and all comparable in size with the moon, and somehow they are always close together in the sky in all movie scenes - which would happen, but it's rather rare.
However, unfortunately, systems with multiple big moons are unstable
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And even systems with one big moon seem to be rather rare, for earth like planets - there is only one such system in our solar system (Mars has two but they are small).
However: in systems around small stars, like the TRAPPIST system, the planets are so close together that their apparent diameters are comparable to our moon's. I'd love to see a night sky there.
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@xkcdbot Single panel comic.
Pony tail says: That thing hanging in the sky is a second nearby world. It's close enough that you can it's surface as it passes overhead.
No hair replies: Wow. Isn't that...weird?
Pony tail replies: I dunno, it's just always been there.
Lower caption: If it didn't exist, the moon would sound like such an outlandish sci-fi concept.
xkcd bot (now with alt text)
Jorge Stolfi
Oliver Kurth
Sam Levine
K. Collett