this post was submitted on 21 Mar 2025
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Bullseye (lemmy.world)
submitted 4 days ago* (last edited 4 days ago) by [email protected] to c/[email protected]
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[–] [email protected] 14 points 4 days ago

https://xkcd.com/681_large/

The sun creates a big gravity well. The earth happens to be quite close to the top of this well (because of the inverse square low). It takes about the same energy to go down and up the gravitational well.