Finally, an Explanation for the Cold Spot in the Cosmic Microwave Background - Universe Today

Cosmic voids refer to the vast regions of space that lie between galaxies and galaxy clusters that make up the large-scale structure of the Universe. These voids are defined by their relative lack of “normal matter” like galaxies or dust and gas – the – and less dark matter than what’s observed in galaxy clusters. Whereas these structures are held together by the force of mutual attraction , they are also expanding because of a theorized but undetected force .

Located 1.8 billion light-years away in the constellation Eridanus, the Eridanus Supervoid was a theorized underdensity where matter concentrations were 30% less than the surrounding galactic region. The center of this void is located 2 billion light-years from Earth, making it the dominant underdensity in our galactic neighborhood. Using data collected by the Dark Energy Survey , the team created a map of Dark Matter in the same direction as the CMB Cold Spot.

Combined with previous observations of the underdensity of galaxies in the region, the new maps also confirmed an underdensity in terms of Dark Matter in the same area. This effectively confirms a Supervoid in the Eridanus constellation that corresponds to what was theorized. This void could be the reason for the CMB Cold Spot, a potential resolution for what these voids say about the evolution of the cosmos, and an indication of how they are still affecting cosmic evolution today.

Diagram showing the Lambda-CBR Universe, from the Big Bang to the current era. Credit: Alex Mittelmann/Coldcreation

storybywill Typical exasperation/sensational headline not backed up by the report. Cold spot or supervoid, the mystery remains. The real explanation is very simple: it’s the empty centre of the rotating universe. As for dark energy, it’s just the centrifugal forces of the rotating universe.

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