The traditional dark matter hypothesis, that it's some form of cold, massive particle that hardly ever interacts with itself ...

The Hubble Space Telescope has been used to study NGC 1052-DF2 — a galaxy that is lacking dark matter. Credit: NASA's Goddard Space Flight Center ...

The cores of galaxies may not be made of what we thought, new research suggests — they could hold one giant, invisible star ...

Without dark matter, the galaxies in our universe would seem ... Van Dokkum is noted for leading a team that identified the ...

Galaxies are not islands in the cosmos. While globally the universe expands—driven by the mysterious "dark energy"—locally, ...

This puzzling result makes sense if one assumes that the boundary stars are feeling the gravitational effects of an unseen mass—dark matter—in a halo around the galaxy. Dark matter could also ...

And when two galaxy clusters collide with each other, clouds of dark matter in them pass straight through each other, without slowing down. These clues serve as the basis to design experiments.

The team's findings, which were published Monday in the journal Nature, also unveil a method of investigating dark matter ... reveal 44 individual stars in a galaxy so far away, that its light ...

Scientists using NASA's Fermi Gamma-ray Space Telescope have detected a mysterious signal in the Andromeda Galaxy ... a chance it could be evidence of dark matter — an unusual type of matter ...