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commando in tophat posted:https://joshworth.com/dev/pixelspace/pixelspace_solarsystem.html I've been to this link quite a few times. Each time, I think to myself "let's just get to Mercury scrolling" then realize that this poo poo is loving wild all over again 
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Feb 23, 2021 14:49
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commando in tophat posted:https://joshworth.com/dev/pixelspace/pixelspace_solarsystem.html That's nuts, thanks. We're going to crash into another galaxy someday, and by "we" I mean "the dust that used to be us"
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Feb 23, 2021 16:06
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commando in tophat posted:https://joshworth.com/dev/pixelspace/pixelspace_solarsystem.html This thing manages to make light speed feel excruciatingly slow, relatively. Gonna let it run and see how long it takes light to reach Pluto.
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Feb 23, 2021 16:54
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When your mom sits around the virgo supercluster she really sits around the virgo supercluster.
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Feb 23, 2021 17:25
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bradzilla posted:This thing manages to make light speed feel excruciatingly slow, relatively. Gonna let it run and see how long it takes light to reach Pluto. Good luck! Unless I hosed up somewhere, it should take 4-7 hours.
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Feb 23, 2021 17:26
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they say the speed of light is like walking
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Feb 23, 2021 17:40
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Man with Hat posted:
Disappointed they didn't specify Earth's size as 1x the size of Earth
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Feb 24, 2021 04:16
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Obliterati posted:Disappointed they didn't specify Earth's size as 1x the size of Earth Also bothered by the fact that they're saying that if A's diameter is 9 times B's, that A is 9 times larger than B. Jupiter's way more than 11 times larger than Earth. It's over 1300 times larger than Earth.
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Feb 24, 2021 04:22
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There was an SCP where some hippies in the fifties fly a van into space to get to Alpha Centauri. They think it'll be a four hour trip since they're going over eighty miles an hour, and then two months later they're dying of scurvy and only just passing the moon. I liked that one.
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Feb 24, 2021 05:36
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big fan of huge stars, like look at this poo poo cmon even then UY Scuti is pretty small compared to space! but if you put it where our sun is it'd extend out past saturn and that rules
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Feb 24, 2021 17:10
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Space is actually very small, it just looks big because there is so much of it.
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Feb 24, 2021 17:22
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space is fuckin huge one thing (out of a billion) I don't understand, where does gravity come from? I've heard "graviton" but is that still theoretical at this point?
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Feb 24, 2021 18:39
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actionjackson posted:space is fuckin huge Looks like graviton is still hypothetical only. Probably the deforming of space-time by mass is still a thing. Picture that image of balls on canvas or something (or better yet GIS "gravity"). No idea how that works, but I'm dumb, so no surprise 
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Feb 24, 2021 18:54
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actionjackson posted:space is fuckin huge There is no working theory of quantum gravity. If you treat gravity as a field and try to quantize it, you wind up with gravitons, just like if you quantize the electromagnetic field you wind up with photons. But if you do this, and try calculate any interactions of these gravitons, your calculations blow up and you wind up with infinities you can't get rid of. This is an indication that you probably don't get to a working theory of quantum gravity by simply trying to quantize gravity. In relativity, gravity results from the shape of spacetime. The presence of mass curves spacetime, and things traveling through space travel along the shortest possible paths in that curved spacetime.
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Feb 25, 2021 02:18
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Gravity is down
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Feb 25, 2021 04:07
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Bloody posted:Gravity is down drat I've been playing Kerbal wrong this whole time!
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Feb 25, 2021 08:41
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actionjackson posted:space is fuckin huge Gravity is how we experience the warping of spacetime by any object with mass.
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Mar 25, 2021 23:27
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Space is only noise if you can see.
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Mar 26, 2021 02:48
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DamnCanadian posted:Gravity is how we experience the warping of spacetime by any object with mass. Warping in what way?
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Mar 26, 2021 02:52
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PostNouveau posted:Warping in what way? Topologically. Space-time where mass (or energy, or a field) is nearby is no longer flat, it becomes curved, and objects in free-fall follow geodesics in that curved volume of space. From our point of view, those straight-line paths in spacetime appear to be things like orbits in space. The relationship between mass and this curvature it inflicts upon the structure of spacetime is described by the Einstein field equations.
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Mar 26, 2021 03:11
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Stuff moves in what it experiences as straight lines. We are under different conditions, so we see those straight lines instead as curved lines that match how we'd see that stuff move if there was a force called gravity. P.S. please don't ask about distant stars or we end up right back at luminiferous aether.
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Mar 26, 2021 16:19
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OK but how does this curvature of space time affect the orbits of say 3 or more bodies?
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Mar 26, 2021 16:25
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PostNouveau posted:OK but how does this curvature of space time affect the orbits of say 3 or more bodies? I’m sure what you mean. In a sense, this is like asking “how does the slope of this hill affect the path of the ball rolling down it?” The bodies are in free fall, they’re following shortest-distance paths through the curved background of spacetime, and those shortest-distance paths *are* the orbits. And since the bodies are massive and their masses then distort spacetime as they move, the shortest-distance paths continually change.
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Mar 26, 2021 18:09
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what if space is tiny and we're just really really tiny? what now, genius?
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Mar 27, 2021 02:42
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Lamebot posted:what if space is tiny and we're just really really tiny? what now, genius? We know that at least one individual on planet Earth cannot be tiny, and must in fact be extremely fat. Bam! How does it feel to be defeated by ur mom?
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Mar 27, 2021 02:57
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Lamebot posted:what if space is tiny and we're just really really tiny? what now, genius? Ooo yeah what if we're subatomic particles in a macrouniverse
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Mar 27, 2021 03:36
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https://www.youtube.com/watch?v=pUF5esTscZI I thought this was a neat way to talk about how space is large but not really I guess
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Mar 27, 2021 14:10
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Phanatic posted:Topologically. Space-time where mass (or energy, or a field) is nearby is no longer flat, it becomes curved, and objects in free-fall follow geodesics in that curved volume of space. From our point of view, those straight-line paths in spacetime appear to be things like orbits in space. The relationship between mass and this curvature it inflicts upon the structure of spacetime is described by the Einstein field equations. Is there an understandable explanation for why gravity-mass and momentum-mass are always the same (are they?) e: I found this page: https://www.sjsu.edu/faculty/watkins/gravinertia.htm The colour scheme makes me think it's legit and it starts out promising, and claims to have explained it in the conclusion, but I got a bit lost along the way. There's lots of bits I don't get, like why these space-time waves don't dissipate or why they don't move at different velocities distortion park fucked around with this message at 20:34 on Mar 27, 2021 |
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Mar 27, 2021 20:19
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