Without that gravitational glue ... the supposed site of an ancient, high-speed collision. When the two original galaxies collided, their dark matter fractions kept right on going, zooming ...

The fascinating saga of how an odd hypothetical particle became a star dark matter candidate. Physics is permeated by ...

Galaxy clusters contain hundreds of galaxies and huge amounts of hot gas and dark matter and are among the largest structures in the universe. Collisions between galaxy clusters release enormous ...

Galaxies and dark matter go together like peanut butter and jelly. Rarely is one without the other, but a recently discovered galaxy called NGC 1052-DF2 is nearly entirely lacking in dark matter.

NASA's Nancy Grace Roman Space Telescope will study wispy streams of stars that extend far beyond the apparent edges of many galaxies. Missions like the Hubble and James Webb space telescopes would ...

These blobs exist as much as 300,000 light years away from other galaxies, and may have formed when the blobs were forcefully ejected from a parent galaxy by collision with another galaxy.

Their scheme involves recalibrating the size of the universe without ... how light and matter interacted at the dawn of time. The Hubble constant is one of the most important parameters defining ...

These distinctive galaxies have arms that seem to wrap around ... with bright regions where stars are being born, as well as dark, dusty areas. Stars form within the spiral arms due to a logjam ...