Is Earth Inside a Cosmic Void? Probably not in the dramatic sense. Evidence suggests our region of the universe may be slightly underdense on very large scales, but not an enormous empty hole, and any such underdensity would change local Hubble constant measurements by only a small amount. It is unlikely to fully solve the Hubble tension, the mismatch between early universe and local expansion rate estimates.

Are we living in a cosmic underdensity—or just seeing quirks in our measurements? Here’s how the Local Bubble, ‘Local Hole,’ and Hubble tension fit together. What’s your take? #CosmicVoid #HubbleConstant #HubbleTension #LocalBubble #LocalHole