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[–] 68 points 10 months ago (3 children)

Sun: "Hey, do you want toooo... go for a walk?"

Planets: go apeshit

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  • [–] 7 points 10 months ago (2 children)

    Based on how Earth is doing, she might be taking us to the big farm upstate. :(

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  • [–] 47 points 10 months ago*

    And like all good mothers one day she will grow into a red giant, engulfing her children and obliterating all life on earth.

    That is the true meaning of mothers day ❤️

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  • [–] 39 points 10 months ago (15 children)

    Did everyone forget about the galaxy? It's also a giant circle, and the sun orbits it like we orbit the sun.

    Perhaps the real question should be "Where is the Galaxy taking us?"

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  • [+] 48 points 10 months ago (11 children)
  • [–] 10 points 10 months ago (2 children)

    Oh no you zoomed out to far and triggered the weird sensation. How bizarre it all is!! To know these things as little ape creatures. So small as to barely exist in a lake of space and an ocean of time. Whywhywhyhowwhyhowhowhow is any of this real???

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  • [–] 5 points 10 months ago (1 child)

    Knowing there's no chance imaginable of being able to witness all this is so depressing... My death anxiety feeds on thoughts like this.

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  • [–] 3 points 10 months ago

    On the plus side, we live at a time where we can still observe the cosmic microwave background radiation and total solar eclipses.

    Since the moon's orbit grows by 3" every year, after a few million years it'll be far enough away that it won't completely eclipse the sun anymore.

    And in a billion year's time, the CMB will be redshifted so far into deep radio wavelengths that it'll be impossible to observe

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  • [–] 5 points 10 months ago (2 children)
  • [–] 2 points 10 months ago

    First thank you for filling in OP's coverup of Mama's intentions.

    We will merge, in a series of passes through each other, with almost no stars actually colliding

    So then, we're just going for a ride to a farm upstate :(

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  • [–] 22 points 10 months ago* (16 children)
  • [–] 6 points 10 months ago (12 children)

    There's also no reason to believe that expansion isn't happening in a spheroid pattern. The big bang wouldn't have been like a blunderbuss, more like a naval mine suspended in the abyss, exploding in all directions.

    For that matter, did the big bang ever cease, or has it continued to spew out new energy, and we're just so inconceivably far out that our entire observable universe is just one small section of a relatively narrow range of distance from the center?

    Lastly, if the big bang is like a faucet, what if black holes are like drains in a tub, or in other words wormholes leading back to whatever realm everything came from before being spewed out by the big bang?

    Everything in the universe is cyclical; there's no way something doesn't complete the circuit, even if it's just a big crunch.

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  • [–] 9 points 10 months ago (3 children)

    This model does assume the big bang happened in a spheroid pattern. It's just flattened to add time as an axis from left to right cause you couldn't represent time otherwise.

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  • [–] 1 point 10 months ago (1 child)

    The big bang didn't happen in a pattern, it happened everywhere at once: https://nasaspacenews.com/2025/10/is-the-universe-infinite-new-evidence-challenges-our-cosmic-understanding/

    The universe expanding means it gets sparser. It has no edge and no center, so it's not spherical. It's either infinite or repeating (e.g. it might be the surface of a 4D torus, but as said: that doesn't imply an edge). I personally believe it's infinite and not repeating.

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  • [–] 1 point 10 months ago (7 children)

    There's also no reason to believe that the big bang happened at one “point”. I believe that the universe (and therefore the big bang) are infinite.

    Everything is relative, so something infinite can still expand: since there's no absolute speed, galaxies can move away from each other everywhere, at all times.

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  • [–] 1 point 10 months ago (4 children)

    The geometry of explosions says otherwise. An explosion implies expansion outward from a center. If every point in space exploded at once, there would be nowhere for anything to expand, thus creating compressive forces.

    You would have to zoom out really really far, beyond the boundaries of the explosion, to see the forces expanding beyond that. And at that point, it's just the Big Bang, only on a larger scale, and with the singularity being really a vast space seen from a much larger scale.

    To illustrate, one speck of C4 explodes in an outward direction, but put a million specks of C4 together into a continuous block, and it still explodes in an outward direction. It's not a million tiny explosions all taking place within the space of the block.

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  • [–] 1 point 10 months ago* (last edited 10 months ago) (3 children)

    No, there's no center and no edge, the big bang happened everywhere at once. The universe might be finite, but only in the sense that it's looping back on itself, not in the sense that it can possibly be a sphere (which has both center and edge). So your mental model of an explosion in 3D space doesn't fit: https://nasaspacenews.com/2025/10/is-the-universe-infinite-new-evidence-challenges-our-cosmic-understanding/

    Metaphors like this at helpful for approaching understanding, but you can't extrapolate from them. There was no 3D space in which the big bang occurred, “nothing” is not the same as “a patch of vacuum in spacetime”. An explosion doesn't start as dimensionless singularity, it starts with the matter that explodes. And so on.

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  • [–] 1 point 10 months ago (2 children)

    I think it's a logical necessity for the universe to be infinite, at least spatially. In order to be finite, it needs to have something outside of it to set a boundary containing it. But if that were the case, then there must be something beyond it, which means the space contained within that boundary would not be the entirety of the universe.

    Whether that space beyond is filled with anything or simply empty until stuff expands into it is a different question. And whether there were multiple other big bangs incomprehensibly far away from the observable universe is another question too. But neither of those possibilities implies that the big bang would have happened at every point in space simultaneously.

    Another reason that possibility is untenable is because of heat dissipation. If every point in space exploded simultaneously, not only would there be nowhere for the force to go, but there would be nowhere for the heat to dissipate too, either. The heat would be uniformly distributed throughout space, offering no possibility of cooling down and coalescing into denser states of matter. The pressure would also be infinite, with no gradient. Everything would simply be an ocean of gammawaves, with no room for expansion.

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  • [–] 1 point 10 months ago (1 child)

    Sorry, I'm not a physicist, but the big bang happening everywhere at once isn't up for debate. As far as I understand, it's a well-settled fact. Read the article!

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  • [–] 1 point 10 months ago*

    I don't think anything in theoretical physics is well-settled fact.

    Edit:

    After a century of observations and theoretical advances, cosmologists can confidently state that the universe is infinite—or perhaps not. The question remains deeply complex. Current evidence suggests our expanding universe lacks both a center and edge, with the Big Bang occurring everywhere simultaneously rather than from a single point. Recent cosmic microwave background measurements indicate nearly flat geometry, supporting infinite extent theories, though alternative models proposing finite, curved space remain possible.

    Yeah, nothing about that says "well-settled fact." Quite the opposite. Either what you said is disinfo or you need to check your reading comprehension.

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  • [–] 1 point 10 months ago (1 child)

    The idea is that the big bang started as a singularity, where everything had the same position as far as our 3d space is concerned, and then the difference in position arose as a consequence of it. Maybe space (as we know it) didn't exist before, maybe it did but collapsed, or maybe there was "other" space but this space we're in popped into existence. Same thing with time and perhaps some other dimensions.

    So it did happen everywhere (where everywhere is just everywhere inside this universe), but it was a single point at that moment.

    Though I suspect it was inside another universe and that our big bang singularity was just another black hole forming in that universe and we're seeing the mystery of what happens beyond the event horizon when gravity overpowers all other forces. Our familiar forces could just be the next set of rules physics for small things (from the perspective of the parent universe) after gravity overcomes the dominant ones in that universe. Which could mean that all black holes are tunnels to other universes (that we can't visit but the matter that makes us could, though it would probably be something else once it did, like an entire galaxy cluster).

    Then the CMB might just be light that entered our universe from the parent one, redshifted like crazy (plus other optical gravitational effects, like any light that enters will appear brighter in one direction but coming from all directions to some extent).

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  • [–] 16 points 10 months ago (5 children)

    Fun, fun, we skip along together!

    Swirling towards the center...

    Where there is no pain and we are truly together, forever.

    ...

    Eat at Arby's

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  • [–] 4 points 10 months ago* (2 children)

    May I have a point of reference?

    Edit: in all seriousness, looking for the point of poignancy

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  • [–] 13 points 10 months ago (3 children)

    It's my understanding that the specific direction on this relative motion graphic is just made-up, but it does do a good job of reminding people that we're orbiting the galactic center.

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  • [–] 4 points 10 months ago (2 children)

    I'd love to know what the actual direction currently looks like though

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  • [–] 11 points 10 months ago

    That's not Mama, that's our son!

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  • [–] 11 points 10 months ago (2 children)

    I mean its kinda terrifying when you think about it from the perspective of someone who grew up in an abusive household

    "You will never leave my control"

    Either you get tossed to the curb by mom and you are cold and alone after being so used to the warmth and the plant is dead (flung out of orbit), or get murdered by her (red giant... engulf the system)

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  • [–] 2 points 10 months ago*

    There's a third option, but it may still lead to option 1 eventually. We invent starlifting, and keep our sun "young," while also having the added benefit of strapping a solar thrusters to her so we can steer the solar system.

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  • [–] 11 points 10 months ago

    The sun is not a sweet mother, he is armed with the great serpent Xiuhcoatl and demands the hearts of our enemies.

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  • [–] 8 points 10 months ago (10 children)

    Does the sun actually travel in a straight line, or do the orbits of the planets wobble it, and to what extent?

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  • [–] 12 points 10 months ago (3 children)

    Everything in the solar system (even the Son) orbit around the center of mass of everything in the solar system. This epicenter is just outside of the Son, on the side that Jupiter is. So the Son wobbles by a little bit more than 1 of its radii.

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  • [–] 2 points 10 months ago (1 child)

    This epicenter is just outside of the Son

    *Sometimes. The other planets can counterbalance Jupiter's effect on the barycenter to pull it back into the surface of the Sun.

    Also, it's Sun, not Son

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  • [–] 1 point 10 months ago

    barycenter

    That's the word I couldn't remember.

    Also, it’s Sun, not Son

    Yeah, I don't know how I messed that up 3 times. I think my brain was stuck between calling it the Sun and Sol. Also the mama and son/sun puns in this thread.

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  • [–] 8 points 10 months ago* (2 children)

    I am under the impression that straight lines don't really exist in the Universe.

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  • [–] 4 points 10 months ago

    Juipiter's orbit wobbles it, as others said, the barycenter of the system is outside the sun's radius, but the scale of the planets vs their orbits is so great such a small wobble is imperceptable if you can see multiple orbits.

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  • [–] 3 points 10 months ago

    I think the graph shows relative position of the planets from the sun, so the straight line is just a baseline.

    Like if you jump up and down on a plane, and the graph just shows you moving a couple of feet up and down rather than including the entire altitude change of the plane itself

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  • [–] 7 points 10 months ago (2 children)

    What if Sol is not our Mama, but our Pied Piper? 🎺

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  • [–] 6 points 10 months ago

    Just a loop around Sag A*

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  • [–] 11 points 10 months ago (1 child)

    The fun stops when you find out about Sagittarius A.

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  • [–] 5 points 10 months ago

    i see, that's why the ecliptic and the milky way don't align on the sky

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  • [–] 4 points 10 months ago

    Mama knows how we behave. She's taking us to the nearest galactic playground where she'll abandon us.

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  • [–] 4 points 10 months ago (2 children)
  • [–] 4 points 10 months ago

    Hey, that's the same path my life is taking!

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  • [–] 4 points 10 months ago

    Isn't this what Sepiroth wanted to do woth Jenova?

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  • [–] 3 points 10 months ago (1 child)
  • [–] 2 points 10 months ago (1 child)

    Wait a minute... We're moving?

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  • [–] 3 points 10 months ago

    IDK sometimes it feels like everything is just gonna explode one day

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  • [–] 3 points 10 months ago* (last edited 10 months ago)

    It's all oscillations.

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  • [–] 3 points 10 months ago (1 child)

    While I've never seen it illustrated until now, I thought it was kind of obvious that this is our reality from outside our solar system. Is it not?

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  • [–] 5 points 10 months ago* (9 children)

    ok! time for all those years of science to finally pay off:

    Would you still love "her" if you knew that, every single second, thousands of waves of extreme radiation from the Sun, traveling at a million light-years per millisecond, hits our planet's atmosphere? These waves slowly erode one of the only protections that we have against the Sun. But don't worry, this planet has several more tricks up -- and under -- the crust of the Earth. The iron core of the earth emits a geomagnetic field that extends into space, creating a region called the magnetosphere. This magnetosphere blocks most of the Sun's deadly rays, deflecting them back into space.

    (also I didn't get this off of Google. I just have a really good memory. also I added the bolded words)

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  • [–] 12 points 10 months ago* (2 children)

    traveling at a million light-years per millisecond

    You're only off by a factor of about 30 quadrillion.

    Light (famously a type of radiation), takes 1 year to travel a light-year, hence the name.

    If you want to make it sound impressive, then astronomical units aren't the right choice. The sun is only 1 AU away from us after all.

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  • [–] 6 points 10 months ago (1 child)

    million light-years per millisecond

    Gonna need a citation on that one! ;)

    kidding aside, Mars is a great example of what will happen to Earth should our core stop generating our magnetic field. Also... Auroras!

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  • [–] 1 point 10 months ago

    Yes! The Auroras are the result of the Sun's rays that were rebounded and sent to both of the poles. Also, I don't know the exact speed, but its really reeeeeaaaaalyyyyy fucking fast. Like, my brain can't even fathom how fast it is. I can't imagine the scientists that study this every single day think. Are they like "oh shit the sun is just about to shart some deadly fucking radiation time to do some science to make it stop" I am actually convinced that science is magic, and every scientist that ever lived had to say some oath to never tell people that they're wizards. Meanwhile we're like "oh ok they have this tool that looks like a medieval torture device they either must be really smart or stole that from a museum or time-traveled and yoinked that shit and brought it back here"

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  • [–] 2 points 10 months ago (2 children)

    If those deadly rays are getting reflected back into space, how do astronauts protect themselves against it? Is the ISS beneath the magnetosphere?

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  • [–] 4 points 10 months ago

    On the side of the Earth facing the sun, the magnetosphere extends about 40,000km into space. On the side facing away from the sun, the solar wind stretches the magnetosphere into a tail that extends well beyond the Moon's orbit. The ISS orbits at an altitude of about 400km; it is well within the magnetosphere.

    Because it is above the majority of the atmosphere (and also because it just barely passes through the lowest part of the Van Allen radiation belts), astronauts in the ISS are exposed to higher levels of radiation. However, the ISS has shielding specifically designed to minimize radiation, and astronauts living there are considered to be within safe levels of exposure.

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  • [–] 1 point 10 months ago

    We're going in a circle, I like to imagine it like a parent driving around the block to put their kid to sleep

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  • [–] 1 point 10 months ago