First version of this article was originally published on 6 April, 2012
MessageToEagle.com - The idea that our Universe could be a small component within a vast assemblage of other universes that together make up a "multiverse" has been treated by physicists as intriguing, but so far it has remained in the realm of theory without any experimental tests that could support it. That might change now when a team of scientists has found evidence that other universes, as well as our own actually lie within "bubbles" of space and time. "It would be a pretty amazing thing to show that we have actually made physical contact in another universe," George Efstathiou University of Cambridge said. The theory that invokes these bubble universes is a theory formally called "eternal inflation". According to this theory, such universes are popping into and out of existence and colliding all the time, with the space between them rapidly expanding, meaning that they are forever out of reach of one another.
Of course, due to the difficulties proving the theory many scientists have remain cautious. With so many scientists having their hands in these tests and theories, the end game could be plenty of groundbreaking results with universal implications for years to come. I'd heard about this 'multiverse' for years and years, and I never took it seriously because I thought it's not testable," Dr Hiranya Peiris, a cosmologist at University College London. "I was just amazed by the idea that you can test for all these other universes out there - it's just mind-blowing." Dr. Peiris and her colleagues have now worked out that when these universes are created adjacent to our own, they may leave a characteristic pattern in the cosmic microwave background (CMB) - the faint glow left from our Universe's formation.
Dr Peiris' team first proposed these disc-shaped signatures in the CMB in a paper published in Physical Review Letters, and the new work fleshes out the idea, putting numbers to how many bubble universes we may be able to see now. Crucially, they used a computer program that looked for these discs automatically - reducing the chance that one of the collaborators would see the expected shape in the data when it was not in fact there.
The team has located possible "bubble universe" evidence in WMAP data
The programs' results revealed that particular areas that look likely to be signatures of the bubble universes, where the bubbles were 10 times more likely than the standard theory to explain the variations that the team saw in the CMB. Despite these interesting results, Dr. Peiris says we should not jump to conclusions. More scientific work needs to be done before researchers can be confident they have found evidence of the existence of the "multiverse".
Planck Telescope. Credit: ESA
"Finding just four patches is not necessarily going to give you a good probability on the full sky. That's not statistically strong enough to either rule it out or to say that there is a collision," Dr. Peiris explained in an interview with BBC. Data from the Planck telescope that is especially designed to study CMB with far greater sensitivity, will put the multiverse idea on a firmer footing, or refute it. However, the data from Planck cannot be discussed publicly before January 2013. George Efstathiou, director of the Kavli Institute of Cosmology at the University of Cambridge, called the work "the first serious attempt to search for something like this from the methodology point of view it's interesting". He noted that the theories that invoked the multiverse were fraught with problems, because they dealt in so many intangible or immeasurable quantities.
"My own personal view is that it will need new physics to solve this problem," he told BBC News. "But just because there are profound theory difficulties doesn't mean one shouldn't take the picture seriously."
Although there could be many universes next to our own, we will never see them direclty.
Dr Peiris said that even if these bubble universes were confirmed, we could never learn anything further about them.
"It would be wonderful to be able to go outside our bubble, but it's not going to be possible," she explained. "They're born close together - that's when the collision happens - and this same inflation happens between the bubbles. They're being hurled apart and space-time is expanding faster than light between them." But Professor Efstathiou said the search was inherently worth it. He explained: "It would be a pretty amazing thing to show that we have actually made physical contact in another universe. It's a long shot, but it would be very profound for physics." The quest for the "bubble" universe continues. MessageToEagle.com based on material provided by BBC See also: No Empty Space In The Universe - Dark Matter Fills The Intergalactic Space Follow MessageToEagle.com for the latest news on Facebook and Twitter ! Recommend this article:
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Little is known about this force and its its repulsive gravity, which is causing the expansion of the universe to accelerate. The riddles of dark matter and cosmic inflation, along with dark energy, these are the three pillars of modern cosmological theory," and none of them can be explained with physics that we know," Michael Turner, director of the Kavli Institute for Cosmological Physics says. 
Last breaths of dying sun-like star have been captured by scientists using NASA's Stratospheric Observatory for Infrared Astronomy (SOFIA). The object observed by SOFIA, planetary nebula Minkowski 2-9, or M2-9 for short, is seen in this three-color composite image. The SOFIA observations were made at the mid-infrared wavelengths of 20, 24, and 37 microns. 
The Earth constantly captures small objects from (to) the NEO population and scientists construct a steady-state model of the Earth's temporary satellites. According to their studies, at any given time there is at least one one-meter-diameter object orbiting the Earth and the average satellite makes about 3 revolutions around the Earth in 9 months. Alien Species Living In The Inner Milky Way Could Be In Danger 
Few people doubt there is intelligent alien life in the Milky Way galaxy, but where can we expect to find it? Astronomers think that while the inner sector of the MIlky Way Galaxy may be the most likely to support habitable worlds. Unfortunately some of these places are also most dangerous to all life-forms. Black Holes With No 'Table Manners' Eat Two Courses At Once! 
It is still unknown how the supermassive black holes (SMBH) in galaxy centres accrete gas and grow. Researchers from the University of Leicester (UK) and Monash University in Australia have investigated how some black holes got so big so fast that they are billions of times heavier than the sun. Mercury Surprises Scientists 
On March 17, MESSENGER (MErcury Surface, Space Environment, GEochemistry, and Ranging) completed its one-year primary mission, orbiting Mercury, capturing nearly 100,000 images, and recording data that reveals new information about the planet's core, topography, and the mysterious radar bright material in the permanently shadowed areas near the poles. Living Earth Simulator - Supercomputer Predicting The Future 
In Douglas Adams book the Hitchhikers Guide to the Galaxy we encounter a machine called Deep Thought. It is the most powerful computer ever built. Deep Thought is capable of answering questions concerning life, the Universe, and simply everything. Now scientists are planning to create a similar machine. It is called the Living Earth Simulator (LES). Proof Of How The Universe Is Changing 
Though the universe is filled with billions upon billions of stars, the discovery of a single variable star in 1923 altered the course of modern astronomy. And, at least one famous astronomer of the time lamented that the discovery had shattered his world view. Bright Star In The Constellation Lyra Is Cooler Than The Human Body 
The coldest class of stars have temperatures as cool as the human body. Astronomers hunted these dark orbs, termed Y dwarfs, for more than a decade without success. When viewed with a visible-light telescope, they are nearly impossible to see. Thermonuclear Burning In A Neutron Star Detected For The First Time! 
It's a very important discovery! For the first time, an international team of scientists have detected all phases of thermonuclear burning in a neutron star, located close to the center of the galaxy in the globular cluster Terzan 5.
MessageToEagle.com - The idea that our Universe could be a small component within a vast assemblage of other 
The team has located possible "bubble universe" evidence in WMAP data
Planck Telescope. Credit: ESA 
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