A century ago, Edwin Hubble revolutionized our understanding of the universe by proving that the Milky Way is just one of ...

A new study reports the first direct observation of merging star clusters in the nuclear region of dwarf galaxies. This ...

Hubble’s original estimate was 500 km/s/Mpc ... Yet another mysterious character that could account for the discrepancy is “dark radiation.” This theory proposes the existence of a new class of ...

The universe doesn't come with an instruction manual—but if it did, University of Missouri Assistant Professor Charles ...

This month marks three years since the James Webb Space Telescope was first launched, which still feels something like a miracle given how many years of delays it took to finally get it orbiting our ...

Hubble had already used this knowledge in his ... His results showing that the universe was expanding supported a theory that had been proposed by Georges LeMaitre in 1927. A universe expanding ...

This "other theory of gravity" uses a different recipe ... promise that it could solve the cosmological issue related to the Hubble tension and could explain the nature of the late-time cosmic ...

Hubble and its fellow observatories give us an unprecedented, crystal-clear look at the far reaches of the cosmos. Explore these orbiting pioneers and learn what they've discovered. 3 min read The ...

Even Einstein was reluctant to endorse this extension of his theory of general relativity. In 1929 at the Mt. Wilson Observatory in California, Edwin Hubble discovered that galaxies were moving ...