The universe is overrun with dark matter, outweighing the ordinary stuff that stars and planets are made of five-to-one. But some corners of the cosmos are more dominated by the i ...

The discovery of CDG-2 began when a team of astronomers investigated tight groupings of stars called globular clusters, which ...

A galaxy made almost entirely of dark matter, an elusive form of matter that doesn’t interact with light, was spotted by Hubble 250 million light-years from Earth.

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

Astronomers have detected a ghostly galaxy that is almost completely made of dark matter. The faint object was revealed by just four globular star clusters hiding in the Perseus cluster.

The local universe may be expanding more slowly than previously thought, scientists have found. The discovery, made in two separate pieces of research, could relieve one of the most troubling ...

Most telescopes are built to chase starlight, yet one of Hubble’s most instructive targets contains no stars at all. The object nicknamed Cloud-9 is a compact, gas-filled cloud whose structure appears ...

A galaxy so faint it escaped detection for as long as anyone has been scanning the sky has finally been found. Called CDG-2, this newly identified “ghostly” galaxy may be one of the most dark ...

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

Astronomers have spotted a galaxy so faint, it’s almost invisible — a discovery that could help illuminate one of the most elusive substances in the universe. The researchers found Candidate Dark ...