By Hannah Osborne | International Business Times
We might just have found evidence of another universe bumping into planet Earth, a scientist has very tentatively suggested. While mapping the cosmic microwave background – the light left over from the early universe – Ranga-Ram Chary found a mysterious glow.
The idea of a multiverse is nothing new. It says we are but one of many other universes. It builds on the notion of cosmic inflation and while the idea has gained more recognition over recent decades, being able to prove other universes exist has been unsuccessful.
A report on the discovery in New Scientist notes that our universe colliding with another should be possible according to modern theories about multiverses. The glow, it is suggested, is matter from another universe with different physics to ours.
Chary took everything from the CMB – removing stars, gas and dust – and at the end of this he should have found nothing except noise. But this was not the case. Instead, in a specific frequency, patches of the sky looked brighter than they should have. They appear to have come from just a few hundred thousand years after the big bang – when electrons and protons combined to create light-emitting hydrogen.
However, these spots of light were 4,500 times brighter than they should have been. Jens Chluba, from the University of Cambridge, commented: "This signal is one of the fingerprints of our own universe. Other universes should leave a different mark."
The multiverse explanation says that some protons and electrons might have come into contact with another universe – a collision that made them much brighter. "To explain the signals that Dr Chary found with the cosmological recombination radiation, one needs a large enhancement in the number of [other particles] relative to photons," Chluba says. "In the realm of alternative universes, this is entirely possible."