What is outside of the multiverse
Astronomers have so far found strongest indications of a “multiverse”. Dark currents seem to reach over the edge of the cosmic horizon.
Greenbelt (USA) - Astronomers working with Alexander Kashlinsky from NASA's Goddard Space Flight Center in Greenbelt, Maryland (USA) have collected new data that support the theory of a “multiverse” more than previous measurements. According to this, parallel universes could be responsible for the mysterious dark current that the research team has found.
This flow manifests itself in the form of spectral shifts in the cosmic background radiation (see message "The dark flow of galaxy clusters" in the link list). These shifts indicate that all galaxies are moving in the same direction at an unexpectedly high speed of up to 800 kilometers per second, in addition to the already existing expansion of the universe.
New findings now extend the group's measurements to a radius of 3 billion light years. The new results were submitted in an article to the journal "The Astropyhsical Journal".
The key question is where this unexpected pull came from. A multiverse theory in which parallel universes play a role can answer this question. Some theories of the early universe contain such multiple universes, which, similar to entangled objects in quantum theory, are coupled in their behavior. The controversial theories suggest that these parallel universes, although otherwise imperceptible to us, can exert a force on our universe that explains the Dark Current. So matter outside of our cosmic horizon, which is limited by the light we receive from space, could exert gravitational attraction on our universe.
"If the flow, as our data suggests, extends to the cosmic horizon, then its origin is probably related to the pre-inflationary overall structure of space-time and points to some kind of multiverse," says Kashlinksky. "We are continuing the project and expect that our future measurements will illuminate this possibility much more clearly".
According to Laura Mersini-Houghton, cosmologist at the University of North Carolina at Chapel Hill (USA) and advocate of a multiverse theory, Kashlinksky's discoveries are "the most direct indications of the existence of the multiverse". Mersini-Houghton emphasizes that the parallel universes theory predicts a dark current, and that even its speed is close to that measured by the Kashlinsky's team.
Finally, it should be emphasized that the Dark Current is by no means proof of multiverse. Admittedly, this phenomenon has so far been incomprehensible to classical cosmologists and their theories, such as general relativity. But it is also clear that to prove one of the numerous multiverse theories, more than just a single clue from a recently discovered phenomenon is necessary.
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