The Vera C. Rubin Observatory has started releasing its first discoveries: including supernovae, variable stars and asteroids ...

Using gravitational waves as a measure of the universe's rate of expansion could solve the biggest headache in physics, the ...

The researchers said that the "hydroxyl gigamaser" was generated by the merger of two galaxies some 8 billion light-years ...

Ripples in the fabric of space-time called gravitational waves may be the key to solving the Hubble tension — one of the biggest nagging problems in physics.

Last year, our most detailed map of the universe yet suggested our understanding of dark energy has been wrong for decades. The shock result is reigniting the search for a better cosmic story ...

Astronomers have long known the universe is expanding—but exactly how fast remains one of the biggest mysteries in cosmology. Different techniques for measuring the Hubble constant stubbornly disagree ...

The shape of the cosmos depends on a balance of two competing forces: the pull of gravity and the expansion driven by dark ...

When you look up at the night sky, it appears unchanging. But if you look deep enough you will find that the sky is in fact ...