Scientists might have spotted another universe, just next to ours.
Scientists have spotted a glow in space that might have come from another universe, outside of ours, that we were alongside when the matter that surrounds us first came into existence.
It has long been thought that our universe probably isn’t the only one that emerged from the Big Bang: our universe might just be one bit of an eternally inflating larger thing. Instead, it’s likely that a number of bubbles of different universes emerged — but we’re unlikely ever to be able to get to or know anything about them.
We might be able to get a peek at one if it had started out close enough that they were touching, with those collisions leaving “signatures” in our universe.
To find the traces, scientists compared a map of the cosmic microwave background of the universe — which is made up of light left over from the early universe — with a picture of the entire sky taken by the European Space Agency’s Planck telescope. When they subtracted one from the other, there was an eerie patch of light left in the sky, which could be left over from collisions with other universes.
The findings — reported by Ranga-Ram Chary in a paper titled ‘Spectral Variations of the Sky: Constraints on Alternate Universes’ this month and reported by New Scientist — show that the universe would have to have a very different makeup to ours. But that is possible, since alternative universes could be wildly different from our own.