Astronomers study 3I/Atlas as its tail rapidly expands and a strange cosmic radio signal reaches Earth, sparking new debate ...

Data captured by a robotic telescope indicate the ion tail now extends a minimum of 0.7 degrees toward the northeast.

Astronomers at the MeerKAT radio telescope in South Africa have reported the first radio detection from interstellar object 3I/ATLAS. First a recap for anyone who isn't up to speed with our third ...

What: Comet 3I/ATLAS reached perihelion on October 30, 2025. This special SETI Live explored what scientists have learned about its origin, chemistry, and trajectory ...

Comet 3I/ATLAS was identified as the third confirmed interstellar object after 1I/‘Oumuamua and 2I/Borisov. At the time of its discovery, the comet was faint, with a magnitude of around 17th to 18th.

We know of three interstellar objects (ISO) that have visited our inner solar system. Oumuamua was the first one, and it came ...

The interstellar object known as 3I/ATLAS has drawn new scrutiny from astronomers after Harvard astrophysicist Avi Loeb ...

Comet 3I/ATLAS reached perihelion on October 30, 2025. While astronomers around the world had been watching this rare ...

Just a couple of short years ago, the world was abuzz with excitement as a human-made spacecraft was hurtling through space, bringing with it samples of a world so alien and distant that we've never ...

Slavin, Jonathan D. and Frisch, Priscilla C. 2007. "The Chemical Composition of Interstellar Matter at the Solar Location." Space Science Reviews, 130 409–414.