The KBC Void: A Gigantic Cosmic Underdensity Proposed in 2013, the KBC void is an enormous region of space spanning two billion light-years, making it the largest void ever observed. Related ...

But that would mean observations are within the KBC void." There are two ways to calculate the Hubble tension; let's call these "observation" and "theory" (though that's really oversimplified).

That would mean that space would appear to expand faster in this "Hubble bubble," officially known as the Keenan-Barger-Cowie (KBC) supervoid (also slightly unflatteringly referred to as "the ...

That would mean that space would appear to expand faster in this "Hubble bubble," officially known as the Keenan-Barger-Cowie (KBC) supervoid (also slightly unflatteringly referred to as "the local ...