Defense Secretary Pete Hegseth said the U.S. has ruled out NATO membership for Ukraine as part of any peace deal with Russia.

A galaxy in the distance, was tightly encircled by a halo of light—also known as an Einstein Ring, a result of gravitational ...

Euclid, a space telescope on a mission to uncover the secrets of dark matter and dark energy, has already made a stunning discovery: a perfectly formed Einstein ring hidden in a well-known galaxy.

Quipu, Hercules, Serpens–Corona Borealis and Sculptor–Pegasus are all larger than the fifth and final superstructure ...

Euclid space telescope sent some images back to Earth during an early testing phase. While reviewing the pictures, astronomer ...

Scientists have found a rare “Einstein ring” near Earth – stumbling on it almost by accident. The rare phenomenon was spotted ...

Euclid, the European Space Agency's dark Universe detective, has made an astonishing discovery -- right in our cosmic backyard.

A European Space Agency telescope has discovered its first "extremely rare" Einstein ring in a galaxy "not too far away" ...

What are we learning about the past? Here are three of our most recent eye-catching archaeology stories.

Experts just found a 3D map that was carved into quartz sandstone likely 13,000 years ago. Located within the famed Segognole ...