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  1. If primordial black holes exist, they are also formed at about one second of cosmic time.

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Is our universe unique? From science fiction to science fact, there is a concept that suggests that there could be other universes besides our own, where all the choices you made in this life played out in alternate realities. The concept is known as a "parallel universe," and is a facet of the astronomical theory of the multiverse. The idea is pervasive in diagramm des universums big bang theory books, video games, television and movies.

A fuller list of parallel universes in fiction is at the bottom of the article. There actually is quite a bit of evidence out there for a multiverse. First, it is useful to understand how our universe is believed to have come to be. Around Then, according to the Big Bang theorysome unknown trigger caused it to expand and inflate in three-dimensional space.

As the immense energy of this initial expansion cooled, light began to shine through. Eventually, the small particles began to form into the larger pieces of matter we know today, diagramm des universums big bang theory as galaxies, stars and planets. One big question with this theory is: are we the only universe out there?

With our current technology, we are limited to observations within this universe because the universe is curved and we are inside the fishbowl, unable to see the outside of it if there is an outside.

There are at least five theories why a multiverse is possiblediagramm des universums big bang theory a Space. Infinite universes. We don't know what the shape of space-time is exactly. One prominent theory is that it diagramm des universums big bang theory flat and goes on forever. This would present the possibility of many universes being out there.

But with that topic in mind, it's possible that universes can start repeating themselves. That's because particles can only be put together in so many ways.

More about that in a moment. Bubble universes. Another theory for multiple universes comes from "eternal inflation. Others, however, will keep getting larger. So if we picture our own universe as a bubble, it is sitting in a network of bubble universes of space.

What's interesting about this theory is the other universes could have very different laws of physics than our own, since they are not linked.

Daughter universes. Or perhaps multiple universes can follow the theory of quantum mechanics how subatomic particles behaveas part of the "daughter universe" theory. Diagramm des universums big bang theory you follow the laws of probability, it suggests that for every outcome that could come from one of your decisions, there would be a range of universes sexy nackte latina frauen sex each of which saw one outcome come to be.

So in one universe, you took that job to China. In another, perhaps you were diagramm des universums big bang theory your way and your plane landed somewhere different, and you decided to stay. And so on. Mathematical universes. Another possible avenue is exploring mathematical universes, which, simply put, explain that the structure of mathematics may change depending in which universe you reside.

Parallel universes. And last but not least as the idea of parallel universes. So, with an infinite number of cosmic patches, the particle arrangements within them must repeat — infinitely many times over.

This means there are infinitely many "parallel universes": cosmic patches exactly the same as ours containing someone exactly like youas well as patches that differ by just one particle's position, patches that differ by two particles' positions, and so on down to patches that are totally different from ours. Famously, physicist's Stephen Hawking's last paper before his death also dealt with the multiverse. The paper was published in Mayjust a few months after Hawking's demise.

About the theory, he told Cambridge University diagramm des universums big bang theory an interview published in The Washington Post"We are not down to a single, unique universe, but our findings imply a significant reduction of the multiverse to a much smaller range of aka ryanne georgina c sara universes. Not everyone agrees with the parallel diagramm des universums big bang theory theory, however.

A article on Medium by astrophysicist Ethan Siegal agreed that space-time could go on forever in theorybut said that there are some limitations with that idea. The key problem is the universe is diagramm des universums big bang theory under 14 billion years old. So our universe's age itself is obviously not infinite, but a finite amount.

This would simply put limit the number of possibilities for particles to rearrange themselves, and sadly make it less possible that your alternate self did get on that plane after all to see China. Also, the expansion at the beginning of the universe took place exponentially because there was so much "energy inherent to space itself," he said.

But over time, that inflation obviously slowed — those particles of matter created at the Big Bang are not continuing to expand, he pointed out.

Among his conclusions: that means that multiverses would have different rates of inflation and different times longer or shorter for inflation. This decreases the possibilities of universes similar to our own. But rather than seeing this lack of other universes as a limitation, Siegal instead takes the philosophy that it shows how important it is to celebrate being unique. He advises to make the choices that work for you, which "leave you with no regrets.

Here are some of the more prominent uses of parallel universes in science fiction. This is by no means a complete list, but a sampling of some of the more-quoted examples. Join our Space Forums to keep talking space on the latest missions, night sky and more! And if you have a news tip, correction or comment, let us know at: community space. Please deactivate your ad blocker in order to see our subscription offer.

Our universe may live in one bubble that is sitting in a network of bubble universes in space. Arguing for a multiverse.

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