• by maaaaattttt on 6/20/2025, 11:59:27 AM

    On a somewhat related note I'm wondering what the expansion of the universe means for our bodies and matter in general? I think, like the accepted answer suggests, the forces on the atomic level make it so that larger structures get back to a certain equilibrium even if constantly streched equaly in all directions. But I have a hard time imagining what the universe expanding really means on a human/solar system scale. I know of the inflatable balloon analogy, but to me, matter is not on the ballon, rather it is the rubber the ballon is made of.

    I have never seen this really explained in details to the general public which I belong to. Maybe that's a sign I'm completely misunderstanding the subject though.

  • by 3cats-in-a-coat on 6/20/2025, 12:16:46 PM

    Gravitational waves move at the speed of light, doubtful you can "look" at it. If it's that strong it'll just seem like a shake. Like an earthquake. Except it's the universe that's quaking.

  • by bawana on 6/20/2025, 1:03:21 PM

    Interestingly, from a statistical mechanical viewpoint , entropy decreases as space expands.

  • by antiquark on 6/20/2025, 12:23:35 PM

    So (in theory) you could hear the chirp of merging black holes, if they were close enough.

    In fact, everyone on the planet would hear the same chirp. Someone should comb the historical records (or even, mythologies) for a birdless chirp heard by many people.

  • by sockboy on 6/20/2025, 11:48:37 AM

    It's fascinating to think about how such tiny ripples in spacetime could be detected and what it might feel like if we could perceive them directly. The scale and subtlety are just mind-blowing.

  • by dboreham on 6/20/2025, 12:32:38 PM

    Obviously as "a disturbance in the force".

  • by jeanlucas on 6/20/2025, 12:59:28 PM

    This would be an awesome xkcd video, they're killing it on YouTube