Science Memes

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W Earth (mander.xyz)

submitted 3 months ago by [email protected] to c/[email protected]

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[–] CptEnder 23 points 3 months ago (1 children)

I mean she's not wrong. Isn't it, astronomically speaking, pretty rare that Earth has a moon that appears exactly the same relative size as its host star?

[–] johannesvanderwhales 7 points 3 months ago (1 children)

As far as we know it's extremely rare and a bit of a mystery how it came to be that way. One theory is that it was the result of a collision with another protoplanet in the early formation of the solar system.

[–] JimVanDeventer 17 points 3 months ago (2 children)

But it isn't a mystery at all. The moon is moving away from us. For billions of years the moon's apparent size was larger than the sun. For billions of years later it will appear smaller. It's simply a lucky coincidence we live in this moment in time, in that regard.

[–] johannesvanderwhales 17 points 3 months ago (1 children)

The "mystery" I was referring to was how we came to have such a large moon to begin with. It's very unusual, and moons on other terrestrial planets are much smaller and probably formed through completely different ways than earth's moon.

[–] JimVanDeventer -5 points 3 months ago (1 children)

That isn't clear at all and I'm not even sure I agree, regardless. Hydrostatic equilibrium is a regularly occuring thing. No, I'm not looking up how regular. The Universe is mind-bogglingly enormous and everything is unusual. Have a good day.

[–] [email protected] 8 points 3 months ago (1 children)

Massive W for johannesvanderwhales

[–] [email protected] 1 points 3 months ago

I really think we should be called a twin planet system. It would be much more representative of our relationship with our satellite.