A never-before-seen image of the cosmic microwave background, combining data from the Atacama Cosmology Telescope (ACT) and ...

"We've always known that we need something to complete the puzzle, but we haven't really known what shape or form those ...

Scientists have found evidence for a cosmic collision in the Perseus cluster, a group of thousands of galaxies not far from ...

Using data from space telescopes and other instruments, astronomers, cosmologists, and astrophysicists are able to deduce and ...

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

A new analysis of the sky has finally confirmed where the missing half of the Universe's visible matter has been hiding.

In the grand puzzle of the cosmos, one question continues to defy easy answers: how fast is the universe expanding?

A new approach suggests that a tiny spin of the universe throughout space might reconcile those conflicting numbers. If the ...

In studying the history of the universe itself ... However, by combining them with observations of Cosmic Microwave Background and supernovae, the best fitting model is one involving a dark ...

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

On April 25, 1990, the Hubble Space Telescope was deployed into Earth’s orbit, beginning a decades-long venture into ...