this post was submitted on 23 Apr 2025
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[–] [email protected] 2 points 3 hours ago
[–] [email protected] 11 points 15 hours ago

I KNEW YOU THOUGHT I WAS GOOD DOG!!!

[–] [email protected] 30 points 21 hours ago (2 children)

I studied general relativity last year and ACKCHYUALLY...

[–] sus 5 points 4 hours ago (1 children)

The earth is rotating, which is a non-inertial reference frame. Fido simply uses its own reference frame, which following the command is now inertial. The result is that Fido is no longer affected by gravity, and slowly floats away just as in the comic

[–] [email protected] 2 points 4 hours ago

good boy fido

[–] [email protected] 7 points 16 hours ago (1 children)

Pfft! I read about it on a box of cereal 5 minutes ago and think I've come to some novel conclusions.

[–] [email protected] 4 points 9 hours ago (1 children)

that's a rad box of cereal

[–] [email protected] 4 points 8 hours ago

I had to switch from existential-os. That box was making me sad.

[–] [email protected] 214 points 1 day ago (41 children)

"but Stephen, there are no fixed points in space. Space is relative, meaning you can only define positions relative to other things. You demand the fundamentally physically impossible of me, Stephen."

[–] [email protected] 1 points 7 hours ago

We're currently unaware of any fixed coordinate system for space itself. There may be one, we have no basis of reference for it.

[–] [email protected] 47 points 1 day ago (4 children)

Ah, but using the cosmic microwave background we actually can determine a universal coordinate system to fix a point in space.

[–] [email protected] 19 points 20 hours ago

that sounds like you're relating your position to something else 😏

[–] [email protected] 55 points 1 day ago (3 children)

cosmic microwave

Oh, so that's why Earth is spinning!

[–] [email protected] 2 points 2 hours ago

The centre is hot while the outside is cold - that's how we know it's true

[–] [email protected] 3 points 16 hours ago

Life is naught but a warm burrito on the rotating microwave plate of Earth.

[–] [email protected] 5 points 23 hours ago

Yeah, and some asshole thought it'd be cool to put fish in it.

[–] [email protected] 40 points 1 day ago (4 children)

But only related to the cosmic microwave background, which, while more universal than most other reference frames, is ultimately still arbitrary

[–] gbuttersnaps 6 points 22 hours ago (1 children)

North is arbitrary as well, that doesn't mean you can't use it for spatial referencing.

[–] [email protected] 8 points 22 hours ago

Yes, for practical purposes, absolutely! But you're always just aligning with something else moving through space, not space itself

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[–] [email protected] 8 points 22 hours ago (8 children)

Why cosmic microwave background radiation? Is that any less arbitrary than e.g. the sun?

[–] [email protected] 3 points 21 hours ago (1 children)

i mean if we were to communicate with aliens in another galaxy it would be the "least arbitrary" one

[–] [email protected] 1 points 16 hours ago* (last edited 16 hours ago) (1 children)

Wouldn't the conversations go like this?

Me: I'm about 2/3rds out the longest arm of my galaxy

Alien: OK

vs

Me: I'm at the place where the CMBR is evenly redshifted in all directions.

Alien: Huh, me too?

[–] [email protected] 2 points 9 hours ago

I'm at the place where the CMBR is evenly redshifted in all directions.

that's not a place that's a frame of motion (i think)

the only issue is it's hard to define an origin for that frame, so yeah it's not gonna be all that useful indeed

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[–] [email protected] 7 points 22 hours ago

General relativity is for nerds (this is a joke).

[–] [email protected] 5 points 21 hours ago
[–] [email protected] 9 points 1 day ago

Does anyone know the artist?

[–] [email protected] 17 points 1 day ago

because fixed points in space (stationary reference frames) fall inwards into gravity wells as time progresses, Fido, would need to burrow into the center of the earth. Fido should shoot into space like that if told to stay at a fixed point relative to the cosmic microwave background

[–] [email protected] 21 points 1 day ago (1 children)

This makes me sad.

Also, it's a little inaccurate as the dog would be moving at hundreds of thousands of kilometers per hour, either burning up in the Earth's atmosphere or plowing through its surface. Also, I don't think dogs have the ability to do this, so there's that.

[–] [email protected] 11 points 23 hours ago (1 children)

We have never truly tested the limits of dogs. Only the limits of what THEY think we want.

[–] [email protected] 3 points 20 hours ago

What they want is to be with us, thus they would never use such a power even if they had it.

[–] [email protected] 14 points 1 day ago

Which frame of reference though? Also time is a dimension should the dog also freeze in time?

[–] [email protected] 19 points 1 day ago

Good boy. Maybe too good.

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