Physicists of Lemmy, what is up?

https://lemmy.world/post/10680818

Physicists of Lemmy, what is up? - Lemmy.World

Like what if I’m in space?

Careful. At best, you’re gonna get some armchair physicist poseurs responding to your question.
Up is what you define as up in your coordinates.
So up is pretend?
No, up is what you define as up.
I define up as yo momma.
Opposition of aggregate primary gravity.
Ok, but what if I’m between galaxies?

There are some hanging out on [email protected]

mander.xyz/c/science_memes

Who is your oldest "hear me out" that you can remember from childhood? - Mander

I’m talking like Ursula or the French spider from from James and the giant peach. Don’t give me some conventionally attractive humans (though humans are totally allowed) please. Personally mine was Goldie from Rock-a-doodle. I probably watched that movie 100 times on VHS as a kid.

Hi there! Looks like you linked to a Lemmy community using a URL instead of its name, which doesn’t work well for people on different instances. Try fixing it like this: [email protected]
You need more context/specificity around your question. Right now, the question is like saying, “What is that thing…?”
But what is it?

Down = where gravity is coming from, the most mass

Up = the opposite direction

What if I’m in a Lagrange point?
The up quark or u quark (symbol: u) is the lightest of all quarks, a type of elementary particle, and a significant constituent of matter. It, along with the down quark, forms the neutrons (one up quark, two down quarks) and protons …
en.m.wikipedia.org/wiki/Up_quark
Up quark - Wikipedia

Nice! I didn’t expect an answer I haven’t even come close to pondering yet!

I don’t understand why people are downvoting this, but up, down, left, right all depend on your frame of reference.

Up in space is nowhere, but at the same time it is everywhere. Those are not physical concepts and they require necessarily a frame of reference to even make sense.

Ok. Frame of reference is half way between here and Andromeda!
That doesn’t really tell me anything, haha
And I’m facing South.
Dude, North, South, East and West are not real either. Again, you need a frame of reference. Those are 100% arbitrary.
I can’t tell if you’re taking me seriously or not. 🤣
I am. “Halfway” is not a frame of reference. You need to arbitrarily define what up and down is. North and South is.
Why would it be arbitrary there? It’s not arbitrary here.
I highly encourage you to Google this question. You don’t seem to understand what a frame of reference is. At least not in this context.
The enemy gate is down, Ender!
Oohh this makes an excellent point!
Ah yeah I didn’t think they’d find this as amusing as others would.
Charm is doing good, color is ok, spun af atm, gluons be holdin me back from my travels
What are you on about?
Subatomic particle physics duh
I’ll have two of what this guy has.

May i present to you the cosmological principle

en.m.wikipedia.org/wiki/Cosmological_principle

the cosmological principle is the notion that the spatial distribution of matter in the universe is uniformly isotropic when viewed on a large enough scale

So in some sense, everywhere is up

Cosmological principle - Wikipedia

I was thinking up is the direction of the expansion of the universe. Not sure if this supports that or not. Or maybe since we’re drawn that way, it’s the opposite?
The same direction it usually is relative to your perspective, assuming you’re aligned to the galactic plane.