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

The catalog of gravitational waves "heard" by LIGO, KAGRA and Virgo has doubled with detections of spacetime ripples.

A unique technique allowed astronomers to see the early universe as a "sea of light" and explore the effects of gravity and ...

The oldest stars in the Milky Way are forcing a fresh look at one of cosmology’s biggest arguments. If some of them are about ...

Learn how Hubble is measuring the expansion rate of the Universe in this new explainer from NASA's Goddard Space Flight ...

The space between galaxies is not empty. In a new map of the early universe, those “blank” stretches take on a faint, ...

Using gravitational waves as a measure of the universe's rate of expansion could solve the biggest headache in physics, the so-called "Hubble tension." ...

Researchers from the University of Bologna and the Leibniz Institute for Astrophysics Potsdam (AIP) along with other institutes have proposed a new way to address the Hubble tension by comparing ...

Daylight saving time shifts stargazing, with safe solar viewing, summer constellations and New Mexico dark skies on display.

Russia’s war has left many of Ukraine’s world-class observatories in ruins—but the besieged nation’s astronomers already have ...

A recent SpaceNews opinion article argued that it is time to “take astronomy off Earth.” The suggestion is straightforward: If satellite constellations and commercial space activity threaten ...

Astronomers have long known the universe is expanding—but exactly how fast remains one of the biggest mysteries in cosmology.