For astronomers studying dark matter, the Bullet Cluster is one of the greatest laboratories in the universe. Follow-up ...

A swarm of galaxies called the Bullet Cluster is the biggest, best natural laboratory for studying dark matter that ...

The Hubble Space Telescope has been used to study NGC 1052-DF2 — a galaxy that is lacking dark matter. Credit: NASA's Goddard ...

In 1925, Edwin Hubble's observation of Cepheid variables in the Andromeda galaxy revolutionized astronomy, proving the ...

Scientists have found potential evidence of past life on Mars in a rock sample collected by a NASA rover, but plans to return ...

A rock found last year on the surface of Mars offered tantalising evidence that life once existed on the Red Planet. Now ...

The discovery by the six-wheeled rover in Jezero Crater represents one of the best pieces of evidence to date about the ...

For more than two decades, the standard model of cosmology has stood as a reliable guide to the universe. Known as Lambda ...

The agency’s scientists are still not saying they found fossils of Martian microbes, but analysis of the specimen collected ...

Dark energy—the term used to describe whatever is causing the universe to expand at an increasing rate—is one of the universe ...

Large pieces of dark matter hitting Jupiter’s largest moon would form distinctive craters in its icy surface, and upcoming ...

Let's qualify this discovery: The evidence is contained in a rock that's around 140 million miles away and has only been ...