Even a Cyclical Universe Needed to Come From Somewhere - by BrianKoberlein
. Although effects within the universe have causes, the universe as a whole may not have or need one. But that answer doesn’t feel very satisfying.There is, however, an alternative. It’s known as the cyclic universe model, and it argues that our current observable universe is part of a series of universes. Our universe is currently expanding because of the Hubble parameter, and if that parameter stays constant it will expand forever.
There is a way to get around this problem. The universe could have an overall scale factor. If that scale factor increases with each universe, then the entropy problem goes away. What’s interesting is that this scale factor is conformally invariant. This means it doesn’t change how the universe appears. Each universe might be twice as big as the previous one, but everything within that universe scales by the same factor.
This conformally invariant scale factor allowed the cyclic universe to exist without a beginning. Each universe has a cause, and it’s turtles all the way down. But a new study has found a flaw in this idea. The team looked at the mathematical structure of cyclic universe models within general relativity and found that all of them are geodesically past-incomplete.
Norge Siste Nytt, Norge Overskrifter
Similar News:Du kan også lese nyheter som ligner på denne som vi har samlet inn fra andre nyhetskilder.
Climate drama is far from over in Congress — and CaliforniaStrange circumstances aside, the Inflation Reduction Act is a big deal, with nearly $370 billion in climate and clean energy spending. Here's everything you need to know about the Senate deal — and what comes next:
Les mer »
Oakland can’t hold off Angels’ Ohtani in 5-1 lossA’s Chad Pinder scored the only run for Oakland with a homer in the ninth inning
Les mer »
Pitching prospect’s call-up signals start of a new era in OaklandProspect progress could add excitement to lost Oakland A’s season
Les mer »
How to Make Vibrant, Flavorful Fruit FrostingsWhen it comes to flavored frostings, just say no to watery fresh-fruit purée—the concentrated color and flavor of freeze-dried fruit is what you need.
Les mer »
Ethereum Price Soars as “Merge” Upgrade Comes Even CloserThe Ethereum network has made the final step before transitioning to proof-of-stake
Les mer »