Questions like this was the main reason prompting me to do Physics at University. This week the idea that other universes - as well as our own - lie within "bubbles" of space and time has received a boost. This is realized by the studies of the low-temperature glow left from the Big Bang suggest that several of these "bubble universes" may have left marks on our own.

Earlier this year, European Space Agency telescope lifts the veil on two of the largest galaxy clusters in the universe. The telescope, which began its mission in August 2009, is designed to look at 'cold' parts of the universe which are not easy to detect. See the Daily Mail article”

“The primary goal of Planck is to probe the 'cosmic microwave background', the faint afterglow of the Big Bang itself. A key aim is to find the 'smoking gun' evidence for inflation, the super-fast expansion of the universe that cosmologists believe occurred in the first moments after the Big Bang. Dr David Parker, director of space science and exploration at the UK Space Agency, said: 'We're proud to be playing a key role in this amazing discovery machine.”

Now days the concept of "multiverse" idea has become very popular in modern physics as well as numerous science fiction books, serials and movies. however, experimental tests have been hard to come by. The preliminary work, to be published in Physical Review D, will be firmed up using data from the Planck telescope.

"First observational tests of eternal inflation: Analysis methods and WMAP 7-year results
Stephen M. Feeney, Matthew C. Johnson, Daniel J. Mortlock, and Hiranya V. Peiris
Accepted Thursday Jul 07, 2011" This team has worked with seven years' worth of data from the Wilkinson Microwave Anisotropy Probe, which measures in minute detail the cosmic microwave background (CMB) - the faint glow left from our Universe's formation.

planks telescop data

The theory that invokes these bubble universes - a theory formally called "eternal inflation" - holds that 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.

But Hiranya Peiris, a cosmologist at University College London, 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 CMB. George Efstathiou of University of Cambridge said:

“It would be a pretty amazing thing to show that we have actually made physical contact in another universe”

But Hiranya Peiris, a cosmologist at University College London said:

"I'd heard about this 'multiverse' for years and years, and I never took it seriously because I thought it's not testable," Dr Peiris told BBC News. "I was just amazed by the idea that you can test for all these other universes out there - it's just mind-blowing."

IMHO these kind of study requires using advanced mathematics and since one uses Computer program to look the patterns, there would be a need to to ensure to reduce the chance of collaborators influence the outcome by seeing the shapes in data. It would be a complete waste of effort if someone can suggest that the result is cooked or manipulated in any shape or form.

The program has found four 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. Statistical Significance is also important so Dr Peris has stressed that more data will be needed to be assured of the existence of “multiunivers”.

I have read lots of articles in the last few years for proponents of Multiverse but those theories that invoked the multiverse were usually fraught with problems. For example they dealt in so many intangible or immeasurable quantities that only the few researchers that are dealing with the data day and day out, can have a reasonable visibility on the big picture.

In BBC article 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."

As the search goes on, we should also realize that what we are looking at is deep in our past, as I said in my other related blog earlier this week.

IMHO the data from the state of early universe can only be analysed with physics today and not what ruled before. So the questions such as two below is relevant in analysis of all these data:

Was the laws of physics some 13 billion years ago was the same as today?
Did we have the same values for the physical constants that are used in the calculations of the data or the events today as in the constants in the past?
Do we even know what the physical constants were that far in the past? For example was the speed of light the same today as it was 13 billion years ago? Plank constant and all the other constants used in calculations need to be validated against time.

These are the questions that we hope the researchers have good handle on before they publish their findings.

Here are couple of videos that try and explain the theory as best as possible for the none physicality.

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