Join Bernardo Oliveira on Amplify
The Web's Social News Network.

Curate, connect & build relationships you'll learn from.

SciFy
« Amplog Home   Posts tagged: universe
  • Name: Bernardo Oliveira
  • Location: Curitiba, Brazil
  • Twitter:
  • Bio: Computer Science, Web and Mobile Technologies, Social Medias & Networking, Information Security, Neurology & Psychology, Scientific Programming, Physics and the studies of the universe are everything that keeps me going.
1054292

Categories

Physicists Calculate Number of Parallel Universes

Amplify’d from www.physorg.com
Universes
The strongest limit on the number of possible universes is the human ability to distinguish between different universes.
Over the past few decades, the idea that our universe could be one of many alternate universes within a giant multiverse has grown from a sci-fi fantasy into a legitimate theoretical possibility. Several theories of physics and astronomy have hypothesized the existence of a multiverse made of many parallel universes. One obvious question that arises, then, is exactly how many of these parallel universes might there be.

In a new study, Stanford physicists Andrei Linde and Vitaly Vanchurin have calculated the number of all possible universes, coming up with an answer of 10^10^16. If that number sounds large, the scientists explain that it would have been even more humongous, except that we observers are limited in our ability to distinguish more universes; otherwise, there could be as many as 10^10^10^7 universes.

Read more at www.physorg.com
 

Think it’s crazy? Check this out, then:

To work these numbers out, Linde and Vanchurin looked back to the time shortly after the , which they view as a quantum process that generated lots of quantum fluctuations. Then during the period of inflation, the universe grew rapidly and these quantum fluctuations were “frozen” into classical perturbations in distinct regions. Today, each of these regions could be a different universe, having its own distinct laws of low energy physics.

By analyzing the mechanism (called “slow roll “) that initially generated the , the scientists could estimate the number of resulting universes at 10^10^10^7 (a number which is dependent on the model they used). However, this number is limited by other factors, specifically by the limits of the human brain. Since the total amount of information that one individual can absorb in a lifetime is about 10^16 bits, which is equivalent to 10^10^16 configurations, this means that a human brain couldn’t distinguish more than 10^10^16 universes.

Oh well, that wouldn’t happen if we could store information in quantum size, would it? :D

This is fascinating and extremely good work! I find it interesting that they could make such a big step on this even without proving the theories behind it. It’s awesome to find a number that could be direclty related to our “infinity”. 10^10^16 is our limit and who would’ve know that?

The study also makes possible many new researches on the subject. And it goes even better:
“When we analyze the probability of the existence of a universe of a given type, we should be talking about a consistent pair: the universe and an observer who makes the rest of the universe ‘alive’ and the wave function of the rest of the universe time-dependent,” the scientists write.

Beautifully complicated. But hell, nodody said that it had to be simple. I’m now very excited to see the further studies on it. Hope you guys enjoy it just as much as I did. :)

Invisible hand in invisible matter. Dark matter might not exist.

Amplify’d from www.physorg.com
An international team of astronomers have found an unexpected link between mysterious ‘dark matter’ and the visible stars and gas in galaxies that could revolutionise our current understanding of gravity.

Such a force might solve an even bigger mystery, known as ‘dark energy’, which is ruling the accelerated expansion of the Universe. A more radical solution is a revision of the laws of gravity first developed by Isaac Newton in 1687 and refined by Albert Einstein’s theory of General Relativity in 1916. Einstein never fully decided whether his equation should add an omnipresent constant source, now called dark energy.

the team believes that the interactions between dark and ordinary matter could be more important and more complex than previously thought, and even speculate that dark matter might not exist and that the anomalous motions of stars in galaxies are due to a modification of gravity on extragalactic scales.Read more at www.physorg.com
 

Dr Famaey added, “If we account for our observations with a modified law of , it makes perfect sense to replace the effective action of hypothetical dark matter with a force closely related to the distribution of visible matter.”

The implications of the new research could change some of the most widely held scientific theories about the history and expansion of the universe.

Lead researcher Dr. Gianfranco Gentile at the University of Ghent concludes, “Understanding this puzzling conspiracy is probably the key to unlock the formation of and their structures.”

What about NASA’s direct proof on dark matter’s existance? Broken study?

This is actually makes sense, but so far is a little hard to accept. Does anyone have any ideas about this?

A Matter of Fact: NASA Finds Direct Proof of Dark Matter

“This is the type of result that future theories will have to take into account,” said Sean Carroll, a cosmologist at the University of Chicago, who was not involved with the study. “As we move forward to understand the true nature of dark matter, this new result will be impossible to ignore.”

Wow!

Amplify’d from www.physorg.com
NASA Finds Direct Proof of Dark Matter
Dark matter and normal matter have been wrenched apart by the tremendous collision of two large clusters of galaxies. The discovery, using NASA’s Chandra X-ray Observatory and other telescopes, gives direct evidence for the existence of dark matter.

These observations provide the strongest evidence yet that most of the matter in the universe is dark. Despite considerable evidence for dark matter, some scientists have proposed alternative theories for gravity where it is stronger on intergalactic scales than predicted by Newton and Einstein, removing the need for dark matter. However, such theories cannot explain the observed effects of this collision.

“A universe that’s dominated by dark stuff seems preposterous, so we wanted to test whether there were any basic flaws in our thinking,” said Doug Clowe of the University of Arizona at Tucson, and leader of the study. “These results are direct proof that dark matter exists.”

NASA Finds Direct Proof of Dark Matter
The Bullet Cluster is made of two colliding groups of galaxies.Read more at www.physorg.com