Comment on wat

EggInDisguise@lemmy.blahaj.zone ⁨2⁩ ⁨days⁩ ago

• yermaw@sh.itjust.works ⁨2⁩ ⁨days⁩ ago

  Thanks for that that’s actually a really helpful analogy.

  I mean i still dont understand. Brain hurty. But thanks anyway

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  • sp3ctr4l@lemmy.dbzer0.com ⁨1⁩ ⁨day⁩ ago

    Things cannot move through space at a speed faster than lightspeed.

    This rule does not apply to space itself.

    Also, interestingly, shadow boundaries can ‘move’ faster than the speed of light.

    iflscience.com/shadows-can-move-across-a-surface-…

    Because a shadow isn’t truly a ‘thing’.

    Its just an area where light bouncing off of something is not happening (as much).

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• capuccino@lemmy.world ⁨2⁩ ⁨days⁩ ago

  All we are going to die?

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  • WolfLink@sh.itjust.works ⁨2⁩ ⁨days⁩ ago

    Yes

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  • EggInDisguise@lemmy.blahaj.zone ⁨2⁩ ⁨days⁩ ago

    Eventually, the universe itself will “die” when it hits absolute zero and nothing moves anymore. Nothing can happen after the heat death of the universe (unless protons decay)

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    • WormEmperor@sopuli.xyz ⁨2⁩ ⁨days⁩ ago

      Finally, some good news.

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    • bss03@infosec.pub ⁨1⁩ ⁨day⁩ ago

      en.wikipedia.org/wiki/Timeline_of_the_far_future breaks this down.

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      • SethTaylor@lemmy.world ⁨1⁩ ⁨day⁩ ago

        Current data suggest that the universe has a flat geometry

        Holyshitholyshitholyshit don’t tell flat earthers

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  • Impractical_Island@lemmy.world ⁨1⁩ ⁨day⁩ ago

    Not unless you donate some seed money to my church. It will come back to you, and then you pay twice as much and then I pay half. And then you, a vulnerable population, gain faith in the process and give more and more and I give less and less but this is just friendly educational propaganda from your friendly neighborhood juggler and CIA spook.

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• mannycalavera@feddit.uk ⁨2⁩ ⁨days⁩ ago

  This is a truly great explanation. One worthy of Feynman. Physics degree?

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  • EggInDisguise@lemmy.blahaj.zone ⁨1⁩ ⁨day⁩ ago

    Lmao no, just autistic fascination with space and many thousands of hours of listening to astrophysics lectures and hundreds of hours listening to edu-tainment type videos from people like Dr. Becky Smethurst.

    Thanks for the compliment though, I’ve heard the balloon explanation since I was a child, but the ant-splanation of light speed just popped into my head.

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    • vaionko@sopuli.xyz ⁨1⁩ ⁨day⁩ ago

      On todays episode of: University degree or autism?

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• kevin2107@lemmy.world ⁨20⁩ ⁨hours⁩ ago

  WHOS BLOWONG UP THE BALOON AND WHEN WILL IT 💥

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• Korhaka@sopuli.xyz ⁨2⁩ ⁨days⁩ ago

  The space between atoms starts to expand faster than the speed of light. Well i guess that is the universe fucked.

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  • rockerface@lemmy.cafe ⁨2⁩ ⁨days⁩ ago

    Good thing the atoms (and the subatomic particles) are pulled back together as the universe expands. The same way we are pulled to Earth by gravity and don’t fly off into space as the universe expands.

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    • skulblaka@sh.itjust.works ⁨2⁩ ⁨days⁩ ago

      This does, however, lead to the existence of “local groups”.

      Meaning that, there is a local group of celestial bodies that we may theoretically be able to visit at some time in the future, which are held somewhat together by gravitational forces which help to counteract the expansion of space. But anything outside of that local group will be expanding away from the group at greater than the speed of light.

      Meaning, effectively, that the universe is going to be / is already separated out into small pockets of local neighbors, who will never be able to reach other local groups unless they invent some sort of much faster than light travel. The universe is very, very large, but the percentage of the universe that is physically reachable by us is quite small.

      Personally I find that to be one of the more disappointing true facts about the universe.

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      • SpacetimeMachine@lemmy.world ⁨2⁩ ⁨days⁩ ago

        Exactly, there will be causally disconnected pocket universes in the future. I’m thankful we still live in a time when we can see the rest of the universe. Creatures alive in 100 billion years might have no way to figure out how the universe started, or that there is anything outside of their local cluster at all.

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  • Tiresia@slrpnk.net ⁨2⁩ ⁨days⁩ ago

    How fast space expands is described by general relativity. For the space between atoms to expand faster than the speed of light, you need a shitload of energy crammed together very densely, like a galaxy worth of stuff in every atom. This is called cosmic inflation, and it’s what happened during (and possibly before) the first part of the big bang.

    We don’t know exactly how there can be this much energy in this little space, or where it all went, but we do know it was there because there are waves imprinted on the density of the universe.

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  • EggInDisguise@lemmy.blahaj.zone ⁨1⁩ ⁨day⁩ ago

    Without trying to explain things even in not sure I grasp, no. The atomic forces keep atoms together, and expansion of space is only noticeable on long distances.

    Also fun fact: the rate of expansion is not only INCREASING as space expands, last information I saw suggested space is expanding faster in some directions than others, which is fascinating for a number of reasons.

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• HeyThisIsntTheYMCA@lemmy.world ⁨2⁩ ⁨days⁩ ago

  courtney you are going to invent rocket ants knock it off

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• Ichiro_kun@lemmy.world ⁨1⁩ ⁨day⁩ ago

  Didn’t get it but saving this so when i grow older I’ll see it again and think for the logic behind it… 🗿

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• Valmond@lemmy.dbzer0.com ⁨2⁩ ⁨days⁩ ago

  But space contracts at close to light speed,so your analogy isn’t perfect, right?

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  • wholookshere@lemmy.blahaj.zone ⁨2⁩ ⁨days⁩ ago

    No, time contracts, not space.

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• Ichiro_kun@lemmy.world ⁨1⁩ ⁨day⁩ ago

  Didn’t get it but saving this so when i grow older I’ll see it again and think for the logic behind it… 🗿

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