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#spacetime

6 posts6 participants2 posts today

A key prediction derived from #autaxys is that observations at very large redshifts (early #universe), may reveal anomalies or deviations from standard cosmological models that are not explicable by #darkmatter or dark energy but are consistent with the hypothesis of evolving #autaxic laws or large-scale autaxic #spacetime dynamics. This #prediction, while challenging to test directly, offers a potential avenue for distinguishing autaxys from other cosmological frameworks.

The all mighty mitochondria as the possible reason we don't see E.T.s already.

Also, looks like PBS is in trouble D: risking a shutdown along with public media. US people can help urge congress not to let it go down. There's a link in the video's description for that.

Supporting content of this quality can never go wrong.

#science #pbs #spacetime

youtu.be/abvzkSJEhKk?si=E76nDV

youtu.be- YouTubeEnjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube.

Scientists have found evidence supporting Einstein’s prediction of “gravitational memory,” a permanent spacetime distortion caused by gravitational waves. New research suggests these wrinkles might be detectable using existing technology, revolutionizing our understanding of black hole collisions and Einstein’s general relativity.

@goodnews

#Physics #Einstein #BlackHoles #SpaceTime #GravitationalWaves #Science #GoodNews #Astronomy
livescience.com/space/black-ho

Live Science · Unproven Einstein theory of 'gravitational memory' may be real after all, new study hintsBy Andrey Feldman

   
#TimeTravelTuesday #ThoughtExperiment: Many #Worldlets?

or in other words, fractions of #World, not the whole World. #TimeTraveler #theories often involve splitting or multiplying #universes. Time Travel events divide #spacetime into two near-identical clones. Grandfather lived or did not, you did not meet yourself or you did. But if we think this through further, its scope might not be quite so universal as typically presented.

Take 3 heavenly bodies: Mother #Earth, the #AlphaCentauri triple star system (at 4+ light years away), and #Polaris, the #NorthStar (at 400+ light years away).

Now we program our #TimeMachine to take us back one year (#retrograde) where we meet ourselves. Hi selves! This all takes place in one year. There's the original us, there's us leaving the present, and there's us meeting our past/original selves a year earlier — standard #boilerplate #scifi #movie #script.

Alpha Centauri will have to wait another 3 years before any of this information can get to there. This is related to the concept of a #lightcone which expands at the speed of light. This doesn't sound quite so much like birthing a twin universe, does it? Now what about the North Star? It will have to wait 433 years for news of our Time Travel event(s). And that's still pretty much in our tiny #celestial neighborhood.

The point is that the effects of such events are largely localized and rapidly diluted as we move farther away. This still has its paradoxical problems, but it doesn't quite feel like the whole universe dividing into two — maybe part of it (a universelet? a subuniverse?) Possibilities are that in moving further out in space-time, the effects of a Time Travel incident may be 'blurred out', as are anomalous numerical samples in the law of large #numbers. If one pours a cup of coffee into a lake, it doesn't change the color of the lake. There is a brief chaotic #glitch before it is no longer measurable.

It is tempting to imagine space-time as "stitching" itself back together. (Glitch & stitch?) Such speculations are related to #StephenHawking's "chronology protection conjecture" of 1992. And along with #blackholes, #entanglement, and other #quantum phenomena, if Time Travel is possible, then we should be looking for it at every scale. We could be surrounded by time-traveling particles everywhere all the #Time.

🔗 Wikipedia.org/wiki/Many-worlds#ManyWorlds
🔗 Wikipedia.org/wiki/Temporal_pa#GrandfatherParadox
🔗 Wikipedia.org/wiki/Light_cone#LightCone
🔗 Wikipedia.org/wiki/Time_travel#TimeTravelTheory
🔗 Wikipedia.org/wiki/Law_of_larg#LawOfLargeNumbers
🔗 Wikipedia.org/wiki/Chronology_#ChronologyProtectionConjecture

wikipedia.orgMany-worlds interpretation - Wikipedia