A never-before-seen image of the cosmic microwave background, combining data from the Atacama Cosmology Telescope (ACT) and ...

A groundbreaking discovery has rocked the field of neutrino astronomy—scientists have detected an ultra-high-energy neutrino ...

A new analysis of astronomical data suggests unknown physics is at work assisting dark energy in acting almost as "antigravity," undoing the work of gravity, which clumps together matter to build vast ...

The halo is more extended that astronomers originally thought, and contains enough hydrogen gas to resolve the problem of the ...

Scientists have developed a cosmic car radio that could tune into the frequency of axions, a prime dark matter suspect.

Leading this quest is the Dark Energy Spectroscopic Instrument (DESI), a global collaboration involving over 70 institutions.

Leading this quest is the Dark Energy Spectroscopic Instrument (DESI), a global collaboration that maps the universe's 3D large-scale structure by measuring redshifts of tens of millions of celestial ...

For decades, scientists have known that ordinary matter — everything made of atoms — accounts for just 15% of the universe’s ...

Cosmic microwave background data support cosmology’s standard model but retain a mystery about the universe’s expansion rate.

Astronomers tallying up all the normal matter—stars, galaxies and gas—in the universe today have come up embarrassingly short ...

The collaboration measured the polarization of light from the cosmic microwave background (CMB ... of 1,300 are the dominating vacuum energy (also called dark energy) of empty space." ...

In recent years, one of the most troubling puzzles in astrophysics has grown more urgent. Scientists have realized that the ...