The Atacama Cosmology Telescope in Chile not only confirmed one of the greatest mysteries in the universe—it also ruled out ...

Keck Observatory reports that spectroscopy from its Keck Cosmic Web Imager, combined with data from NASA’s James Webb and ...

In the leading model of cosmology, most of the universe is invisible: a combined 95% is made of dark matter and dark energy.

Space is packed with all sorts of weird and unexpected stuff, but this humongous, spinning string-thing raises a whole new ...

A team of astronomers using a variety of ground and space-based telescopes including the W. M. Keck Observatory on Maunakea, ...

Cosmic dawn galaxies seen by JWST reveal hidden clues about dark matter and keep rival theories about its true nature alive.

For over two decades, cosmologists have believed that the universe is expanding at an accelerating pace, driven by a ...

Astronomers have unveiled Quipu, a colossal cosmic mega-structure stretching 1.3 billion light-years, more than 13,000 times ...

There is an important and unresolved tension in cosmology regarding the rate at which the universe is expanding, and ...

From a particle smasher encircling the moon to an “impossible” laser, five scientists reveal the experiments they would run ...

New measurements using gravitational lensing suggest the universe’s current expansion rate does not agree with signals from the early cosmos.