One possible explanation of the cold spot is a huge void between us and the primordial CMB. Voids can produce a cooler region than surrounding sightlines from the late-time integrated Sachs-Wolfe effect.[8] This effect would be much smaller if dark energy weren't stretching the void as photons went through it.
Rudnick et al.[9] found a dip in NVSS galaxy number counts in the direction of the Cold Spot, suggesting the presence of a supervoid. Since then, some additional works have cast doubt on the supervoid explanation. The correlation between the NVSS dip and the Cold Spot was found to be marginal using a more conservative statistical analysis.[10] Also, a direct survey for galaxies in several one-degree-square fields within the Cold Spot found no evidence for a supervoid.[11] However, the supervoid explanation has not been ruled out entirely; it remains intriguing, since supervoids do seem capable of affecting the CMB measurably.[7][12]
Although large voids are known in the universe, a void would have to be exceptionally vast to explain the cold spot, perhaps 1000 times larger in volume than expected typical voids. It would be 6 billion–10 billion light-years away and nearly one billion light-years across, and would be perhaps even more improbable to occur in the large scale structure than the WMAP cold spot would be in the primordial CMB.

A controversial claim by Laura Mersini-Houghton is that it could be the imprint of another universe beyond our own, caused by quantum entanglement between universes before they were separated by cosmic inflation.[14] Laura Mersini-Houghton said, "Standard cosmology cannot explain such a giant cosmic hole" and made the remarkable hypothesis that the WMAP cold spot is "… the unmistakable imprint of another universe beyond the edge of our own." If true this provides the first empirical evidence for a parallel universe (though theoretical models of parallel universes existed previously). It would also support string theory. The team claims there are testable consequences for its theory. If the parallel universe theory is true there will be a similar void in the opposite hemisphere of the Celestial sphere[15][16] (which New Scientist reported to be the Southern hemisphere; the results of the New Mexico array study reported it as Northern hemisphere[17]). A sophisticated method of data analysis - Kolmogorov complexity - has derived evidence for a north and a south cold spot in the satellite data:[18] "...among the high randomness regions is the southern non-Gaussian anomaly, the Cold Spot, with a stratification expected for the voids. Existence of its counterpart, a Northern Cold Spot with almost identical randomness properties among other low-temperature regions is revealed." That these predictions and others were made prior to the measurements see Laura Mersini. However, apart from the Southern Cold Spot, the varied statistical methods in general fail to confirm each other regarding a Northern Cold Spot.[19] The 'K-map' used to detect the Northern Cold Spot was noted to have twice the measure of randomness measured in the standard model - the reason is speculated to be the randomness introduced by voids (unaccounted-for voids were speculated to be the reason for the increased randomness above the standard model).[20]

biggest discovery in our universe

From Wikipedia, the free encyclopedia

Eridanus (pronounced /ɨˈrɪdənəs/) is a constellation. It is represented as a river; its name is the Ancient Greek name for the Po River. It was one of the 48 constellations listed by the 2nd century astronomer Ptolemy, and it remains one of the 88 modern constellations. It is the sixth largest of the modern constellations.

Supervoid
The Eridanus Supervoid is the largest supervoid (an area of the universe devoid of galaxies) discovered as of 2007. At a diameter of about one billion light years it is much larger than any other known void and represents a challenge for current theories of the origins of the universe to explain. It was discovered by linking a "cold spot" in the cosmic microwave background to an absence of radio galaxies in data of the United States National Radio Astronomy Observatory's Very Large Array Sky Survey. There is some speculation that the void may be due to quantum entanglement between our universe and another.

See also: WMAP cold spot

The CMB Cold Spot or WMAP Cold Spot is a region of the sky seen in microwaves which analysis found to be unusually large and cold relative to the expected properties of the cosmic microwave background radiation (CMB). The "cold spot" is approximately 70 ЕK colder than the average CMB temperature (approximately 2.7 K), whereas the root mean square of typical temperature variations is only 18 ЕK.

Typically, the largest fluctuations of the primordial CMB temperature occur on angular scales of about 1А. Thus a cold region as large as the "cold spot" appears very unlikely, given generally accepted theoretical models. Various alternative explanations exist, including a so-called Eridanus Supervoid or Great Void.

Originally Posted by Saint

Eridanus Supervoid



CMB cold spot



From Wikipedia for You, takuzo.

I had no idea what is he talking about too, tho checked some sites on Google and vuala - it's not that scary as it seems. Consider fact that I do not speak English daily, I am learning it.
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Also, Hyde, could You explain for me what does mean "quantum entanglement" ? It's like 2 worlds linked in 1 spot?