The idea of the multiverse, in which several separate universes exist in parallel, was once just science fiction but in recent years several notable astronomers and astrophysicists have come to support the idea that they may exist and now the first physical evidence of the multiverse may have been found. In a paper set to be published in the Astrophysical journal, Cosmologist Ranga-Ram Chary has shown that bright spots in a map of cosmic microwave background may be due to the colliding of parallel universes.
The multiverse hypothesis comes from the idea that just after the big bang, different parts of the early universe grew faster than others creating bubbles that could have lead to the formation of multiple universes. If multiple universes were formed, they would have expanded faster than the speed of light as our universe is. Because of this, it is reasonable to think that at some point, two alternate universes could collide.
Cosmic microwave background is the faint glow left over from the big bang, which created our universe. While analyzing a map of the cosmic microwave background taken with the Planck space telescope, Chary came upon an interesting discovery, an unusually bright spot.
Chary thinks this bright spot may be from protons and electrons from another universe pouring into ours and releasing light. Chary has named the phenomenon of two universes colliding ‘cosmic bruising’.
If cosmic bruising did occur in the early universe, it would probably be enough to prove that multiple universes do exist but other scientists aren’t so sure that the bright spot Chary has seen is due to cosmic bruising. Many think cosmic dust or another object in our universe may be the culprit.
“I suspect that it would be worth looking into alternative possibilities,” Says David Spergel of Princeton University, “the dust properties are more complicated than we have been assuming, and I think that this is a more plausible explanation.”
Chary admits that an idea as big as his needs a lot of proof to back it up and more research will be needed before a definitive conclusion can be made as to what’s causing these bright spots.