cosmic microwave background

Astronomers have discovered that stars in the outer portions of galaxies tend to move much faster than expected…

Einstein’s theory of gravity may behave slightly differently across distances of billions of light-years, with gravity appearing about…

A vivid view of the universe showing a star-filled deep space panorama with colorful nebula clouds and distant…

When you buy through links on our articles, Future and its syndication partners may earn a commission. A…

It’s been more than three centuries since Isaac Newton figured out that gravity pulls things together. You’d think,…

“Hearst Magazines and Yahoo may earn commission or revenue on some items through these links.” Here’s what you’ll…

Gravity is so weird that it essentially forces cosmologists into subscribing to one of two equally radical conclusions:…

An artist’s depiction of the halo of hot hydrogen gas surrounding the Milky Way galaxy (center) and two…

One major, unsolved problem in astronomy involves the Hubble constant, a number representing how quickly the universe expands.…

A Gravity Theory That Could Rewrite the Universe’s First Moments The first fraction of a second after the…

Researchers tested gravity across galaxy clusters separated by hundreds of millions of light-years and found it behaves almost exactly as Newton and Einstein predicted, strengthening the case for dark matter