Data from the Atacama Cosmology Telescope (ACT) has now given researchers new detailed images of the universe's earliest ...

Mysterious dark matter makes up 85 percent of matter in the universe, and of the remaining 15 percent, scientists couldn’t ...

About half of the non-dark matter in the universe cannot be accounted for by stars and galaxies alone. Now, scientists say ...

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

Learn how astronomers found the invisible ionized gas that forms puffy halos surrounding galaxies.

Astronomers may have found the long-missing half of the universe's regular matter—and it appears to have been right under our ...

One of the Holy Grails in cosmology is a look back at the earliest epochs of cosmic history. Unfortunately, the universe's first few hundred thousand years are shrouded in an impenetrable fog.

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

NASA's PUNCH sun-studying mission has seen first light — and the team says all four instruments are indeed working as ...

A Stony Brook University professor and a trio of grad students took part in a scientific collaboration that produced the clearest, most precise images of the universe’s infancy, including the ...

Since the James Webb Space Telescope (JWST) began science operations, astronomers have observed galaxies that existed more ...

Hubble’s findings revolutionized humanity’s perspective on the Universe ... in images of a striking ‘spiral nebula’ in the constellation of Andromeda, a fuzzy object among the stars ...