If You Account for the Laniakea Supercluster, The Hubble Tension Might Be Even Larger

When you measure the Universe's expansion rate to relatively nearby galaxies against the expansion rate in the cosmic microwave background radiation, the numbers don't agree, and their error bars don't overlap. This is the Hubble Tension. A new paper suggests the difference might be even greater by 2-3% (1.1 km/s/Mpc) when you account for the gravitational effect from the Laniakea supercluster, which dominates the gravity in our part of the Universe. The post If You Account for the Laniakea Supe...