The most recent measurement of a nearby galaxy cluster is deepening a disagreement about how fast the universe is expanding — ...

Astronomers have made an intriguing discovery that could upend everything we know about the structure of the universe and its ...

Astronomers have spotted something that appears to stretch around ten billion light years across. This so-called ...

These glowing arcs of radio energy are known as "radio relics," faint clouds resulting from powerful shockwaves surging ...