Milky Way May Exist in 'Giant Void', Potentially Resolving 'Hubble Tension'

Researchers propose an alternate theory of gravity, Modified Newtonian Dynamics, to support their hypothesis of a vast, low-density void surrounding our galaxy.

The Milky Way galaxy may exist in a 'giant void', where space is about a fifth as dense as the universal average, according to a team of researchers from the U.K. and Germany.
This 'giant void' could explain the discrepancy between different measurements of the universe's expansion rate, a problem known as 'the Hubble tension'.
The team suggests that the 'giant void' hypothesis could work if an alternate theory of gravity known as Modified Newtonian Dynamics (MOND) is considered.
The 'giant void' would not be completely empty, but have an average density some 20 percent lower than the universe as a whole.
The researchers' calculations suggest that the void surrounding us would be vast—a whopping two billion light-years in diameter.