The catalog of known worlds beyond our solar system has crossed another threshold. NASA’s official tally now exceeds 6,000 ...

The findings surprised researchers, who used the comet's composition to better understand the environment in which it formed.

A rocky cigar-shaped object detected in space last month came from another solar system, astronomers said Monday as they confirmed an unprecedented observation. The discovery may provide clues as to ...

The object arrived near us in 2017, and immediately became one of the most discussed comets in history. Though it was clear that it was the first known interstellar asteroid, its other details were a ...

As 3I/ATLAS passes near the sun, methanol gas glows blue, mixed with icy dust grains, while the far side of the comet glows orange with hydrogen cyanide in this artist's rendering. Credit: NSF / AUI / ...

The interstellar comet 3I/ATLAS was the third object ever discovered in our solar system that originated from another star system. Despite a viral conspiracy theory, NASA officials have repeatedly ...

A NASA‑linked study argues that alien probes could already be in our Solar System, but our surveys are still too crude to ...

CAPE CANAVERAL, Fla. (AP) — A stray comet from another star swings past Earth this week in one last hurrah before racing back toward interstellar space. Discovered over the summer, the comet known as ...

The outer solar system once seemed like a quiet backwater. But a glut of tiny, strange moons with unruly orbits are coming ...

Scientists have searched one of the only known visitors to us from another solar system for signs of alien technology – and found nothing. 3I/ATLAS was discovered last year and identified as the third ...

Ever since the James Webb Space Telescope was launched almost four years ago to the day, the star of space exploration until that time, the Hubble telescope, kind of took a back seat. From time to ...