The local universe may be expanding more slowly than previously thought, a discovery that could relieve a pesky discrepancy ...

Most of the (dark) matter beyond the Local Group of galaxies (which includes the Milky Way and the Andromeda Galaxy) must be ...

Using a novel technique that examines the motion of two nearby galaxy groups within their surrounding cosmic flow, an ...

For decades, scientists have tried to measure how fast the universe is expanding. This expansion rate is known as the Hubble constant, and it plays a central role in understanding the history and ...

The Milky Way isn't just drifting through a giant void in space untethered, but is embedded in a sheet of dark matter like a ...

Two new studies have measured the expansion of the universe in our immediate cosmic neighborhood using a novel method that ...

An international research team has found that the Milky Way and its galactic neighbors appear to sit inside a vast, flat concentration of dark matter, a structure stretching roughly 10 megaparsecs and ...

Astronomers have discovered a flattened structure of matter around the Milky Way that explains the unusual motion of nearby galaxies.

Astronomers have uncovered evidence that the Milky Way is not drifting through space alone but is embedded in a vast, flat structure of dark matter stretching tens of millions of light-years. The ...

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. When will the Milky Way collide with the Andromeda Galaxy?

For decades, astronomers wondered why most nearby galaxies are speeding away from the Milky Way instead of being pulled in by its gravity. New simulations reveal the answer: our galaxy sits in a ...