On Sat, Jun 26, 2021 at 7:31 PM Tomas Pales <[email protected]> wrote:
>> But the world is not stable. The universe looked very different 13 >> billion years ago than it does now because space is not only expanding, >> it's accelerating; and Black Holes evaporate eventually, they are not >> stable, and there are theoretical reasons to suspect protons are not stable >> either, although that has never been experimentally verified. >> > > *> But the laws of physics are apparently the same as they were 13 billion > years ago: law of gravity, quantum mechanics, constants of nature.* > If scientist existed 13 billion years ago they never would've discovered Dark Energy because back then it would've made an undetectably tiny effect on the way things were, the scientists would've found that the expansion of the universe was decelerating just is Newton and Einstein said it would, the universe only started to accelerate about 5 billion years ago, but today it's accelerating so much that Dark Energy makes up 70% of the mass/energy of the entire universe, and in the future it will make up even more. That's because Dark Energy seems to be a property of space itself, so as more space comes into existence from the expansion all matter, even Dark Matter, gets diluted but Dark Energy does not. And that expansion and acceleration means that the law of conservation of mass/energy is only approximately and locally true. And of course the Hubble "constant" is not a constant at all, it changes with time. And that's not all, the universe may have a preferred direction. A new study has found a spatial variation in the Fine Structure Constant (a pure number approximately equal to 1/137) with a 3.9 sigma level of confidence, that means there is a 0.8% chance it's just a statistical fluke. It's not good enough to claim a discovery, that requires 5 sigma or only 0.023% chance of it being bogus, but it's good enough to be interesting. The detected variation has a dipole structure, the laws of physics that govern electromagnetism seem to get stronger in one direction, and the further we look the stronger it gets, and it gets weaker when we look in the opposite direction, with no change in the perpendicular direction. In other words it has a dipole shape. If this turns out to be true then Noether's theorem tells us that the Law Of Conservation Of Angular Momentum is also only approximately and locally true. Four direct measurements of the fine-structure constant 13 billion years ago <https://advances.sciencemag.org/content/6/17/eaay9672> This new optical work is consistent with a different study that used X rays instead of optical light, they also found a variation, and along the same axis. Rethinking cosmology: Universe expansion may not be uniform <https://phys.org/news/2020-04-basic-assumption-universe.html> John K Clark See what's on my new list at Extropolis <https://groups.google.com/g/extropolis> v5n -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/CAJPayv0Y%2BCC6Okn_fQMm7hH9D5LEK4n6hfqu9z3f_2MEOR7-VA%40mail.gmail.com.
