this post was submitted on 24 Feb 2024
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xkcd

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https://xkcd.com/2898

Alt text:

"Some people say light is waves, and some say it's particles, so I bet light is some in-between thing that's both wave and particle depending on how you look at it. Am I right?" "YES, BUT YOU SHOULDN'T BE!"

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[–] hperrin@lemmy.world 0 points 8 months ago* (last edited 8 months ago) (1 children)

I mean, no, not really. The gravitational center of the sun-earth system is within the sun itself, so the earth definitely orbits the sun and the sun definitely does not orbit the earth. Let alone the fact that the sun’s movement is predominantly driven by Jupiter. (The gravitational center of the sun-Jupiter system is just above the sun’s surface.)

[–] gapbetweenus@feddit.de 0 points 8 months ago (1 children)

Pretty sure you can chose earth as fix point and have everything rotate around it on really strange orbits. Everything is kind of relative.

[–] Ashelyn@lemmy.blahaj.zone 0 points 8 months ago (1 children)

Wouldn't that break relativity tho if you treat the earth as a fixed point? Stuff really far out would have to be going absurdly faster than light to orbit the earth once every 24h. I feel like that's one of the ways to tell whether or not you're rotating, or stuff is orbiting you.

[–] gapbetweenus@feddit.de 0 points 8 months ago

Why would objects far out need to orbit earth every 24h?

Wouldn’t that break relativity tho if you treat the earth as a fixed point?

To be honest, physics was never my strong point. If I remember correctly you could chose any point as your observational (?) point but maybe someone with some real physics cred can chime in.