lawrence@lemmy.worldM to Comic Strips@lemmy.world · edit-21 year agoBullseyelemmy.worldimagemessage-square14fedilinkarrow-up1410arrow-down110file-text
arrow-up1400arrow-down1imageBullseyelemmy.worldlawrence@lemmy.worldM to Comic Strips@lemmy.world · edit-21 year agomessage-square14fedilinkfile-text
minus-squareMyatZezou@piefed.sociallinkfedilinkEnglisharrow-up14·1 year agohttps://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.
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.