NASA has now confirmed that 3I/ATLAS is not just another visitor from deep space but the largest interstellar comet ever measured, a frozen fragment of another star system sweeping through our own.

Scientists have discovered the largest comet in the Oort Cloud, a formation of icy bodies at the edge of the solar system. Recent observations found that this comet was bursting with activity, both ...

The interstellar comet 3I/ATLAS made its closest approach to Earth today (Dec. 19, 2025). Here's the latest news you need to ...

3I/ATLAS has now made its closest approach to the sun and Earth and is now heading back out toward the outer solar system. On ...

2025 could be a record-breaking year in terms of discovering new dark comets. Most excitingly, the NSF-DOE Vera C. Rubin Observatory's Legacy Survey of Space and Time (LSST) is scheduled to have its ...

Interstellar Comet 3I/ATLAS makes its closest Earth pass early on Dec. 19. Here's what astronomers know about its origin and speed.

A stray comet from another star is swinging past Earth. Discovered over the summer, the comet known as 3I/Atlas will pass ...

A mysterious interstellar comet known as 3I/ATLAS is about to make its closest approach to Earth in December 2025. Here's ...

A comet, dubbed C/2025 K1 (ATLAS), spectacularly broke apart into three huge chunks — and anybody with an eight-inch telescope or bigger can catch the resulting fireworks show for the next several ...

According to the Harvard scientist, Avi Loeb, the comet, 31/ATLAS, may very well be a serial killer, but this seems to be ...