Astronomers have found the most distant and energetic “odd radio circle” ever detected — a massive double-ringed radio structure nearly 10 billion years old. The discovery, made with the help of ...

The interstellar comet 3I/ATLAS does not come from our corner of the Milky Way, and may be a time capsule of the early galaxy ...

Voyager 1 has been exploring the cosmos for decades, but when it reached the edge of the solar system, it found something ...

An interstellar comet from another star system made a close pass by Mars, with a fleet of spacecraft observing the rare event. The comet, known as 3I/Atlas, zoomed within 18 million miles (29 million ...