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Are We in a Giant Void? That Would Help Explain the Hubble Tension

July 11, 2025
Are We in a Giant Void? That Would Help Explain the Hubble Tension
By Matthew Williams (https://ift.tt/NEPrg5V)

If we are located in a region with below-average density such as the green dot, then matter would flow away from us due to stronger gravity from the surrounding denser regions, as shown by the red arrows. Credit Moritz Haslbauer and Zarija Lukic

It's assumed that our region of the Universe isn't special, and the Hubble Tension, or mismatch of expansion rates of the Universe at different times, is happening everywhere. But what if our place is unusual, for example, if the Milky Way is inside a lower-density region of the Universe, with stronger gravity pulling material away from us in all directions? A new paper suggests we might be in a void that's emptying out towards higher-density regions all around us.



July 12, 2025 at 04:48AM
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