Hubble constant

Space Expanding catalog of black hole collisions is rewriting the history of the universe

A new catalog of gravitational waves reveals heavier, faster-spinning black holes and offers clues about cosmic expansion.

Space Ancient Milky Way stars challenge the age of the universe and the Hubble tension Joseph Shavit

Space Scientists develop a new way to measure the expansion rate of the universe Joseph Shavit

Space What a rare lensed supernova could mean for measuring cosmic expansion Joseph Shavit