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

For decades, scientists have known that ordinary matter — everything made of atoms — accounts for just 15% of the universe’s matter. The rest is mysterious dark matter. But even that modest slice didn ...

The Andromeda galaxy is surrounded by a constellation of dwarf galaxies that are arranged in a highly lopsided manner. Analysis of cosmological simulations published in Nature Astronomy reveal that ...

Can scientists build a detector of near-Earth objects that would sense gravitational waves produced by any "dark" objects ...

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

"Milky seas” are one of the rarest reported forms of bioluminescence. A new scientific database may finally reveal the ...

Learn how through a process known as molecular hydrogen cooling, stars may be able to form in dark matter halos under 10 ...

Two NASA astronauts stuck in orbit for nine months are finally headed home in a SpaceX craft, capping a saga that captured international attention and marked a setback for Boeing Co.'s space business.

There’s more to the universe than meets the eye, he found. His studies led astronomy to the dark side, changing our view of what’s out there.

Euclid is on a quest to unravel one of the universe’s greatest mysteries: why it's expanding faster and faster. With help ...

It drives the movements of stars and galaxies, but dark matter is invisible. While it remains a colossal mystery, a study ...

The exquisite map of our galaxy it assembled has enabled scientists to better understand the galaxy's spiral structure, ...