this post was submitted on 25 Sep 2024
584 points (97.7% liked)
memes
9948 readers
3394 users here now
Community rules
1. Be civil
No trolling, bigotry or other insulting / annoying behaviour
2. No politics
This is non-politics community. For political memes please go to !politicalmemes@lemmy.world
3. No recent reposts
Check for reposts when posting a meme, you can only repost after 1 month
4. No bots
No bots without the express approval of the mods or the admins
5. No Spam/Ads
No advertisements or spam. This is an instance rule and the only way to live.
Sister communities
- !tenforward@lemmy.world : Star Trek memes, chat and shitposts
- !lemmyshitpost@lemmy.world : Lemmy Shitposts, anything and everything goes.
- !linuxmemes@lemmy.world : Linux themed memes
- !comicstrips@lemmy.world : for those who love comic stories.
founded 1 year ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
So all space is expanding. Locally, that's "just a teeny tiny bit," and the force of gravity is plenty strong enough to keep things up to about the size of galaxies (maybe galaxy clusters) gravitationally bound. Andromeda, for example, is the only galaxy that is heading towards us.
But all of space is quite big. Over the vast distances of space, all of the "teeny tiny" local expansions add up. This means that the galaxies which are furthest away from us are also receding from us most quickly. This is not because those galaxies are moving through space; it's because of all the expanding space in between them and us.
The speed of light (in a vacuum) is the fastest anything can move through space.
Would a fair, albeit crude, analogy be like when I fart and the gas forces my butt cheeks apart (the expansion between two objects)? (_|_)π¨
Crude, yes. Fair, no.
Consider a balloon. Uninflated, make a mark on opposite sides, and then make a third mark right next to one of those. When you inflate that balloon, the two points on opposite sides of it become farther apart because of the stretching of the whole balloon, but the two marks right next to each other don't become nearly as far apart, because they are only experiencing "local" expansion.
I wanted to make a fart joke.
But I like your balloon explanation. That makes sense to me.
We must sometimes succumb to our basest instincts.
Donβt you mean our basic stinks?
Ok Iβll stop.
You ended on a high note.
Fill the balloon with a fart
Just fill the balloon with farts.