Need a refresher about 3I/ATLAS? Here's everything to know about the interstellar object, including when the latest ...

Earlier this month, astronomers were thrilled to spot an interstellar object — only the third of its kind ever observed — hurtling toward the center of the solar system on an extremely unusual ...

The interstellar comet 3I/ATLAS may be out of view of Earth, but orbiters on Mars were able to recently get a look at it.

Is it an alien spaceship or an ancient comet? That’s the question puzzling UFO enthusiasts, NASA, and the European Space Agency since an interstellar visitor entered our solar system last month. It ...

Darryl Z. Seligman is supported by an NSF Astronomy and Astrophysics Postdoctoral Fellowship under award AST-2303553. This research award is partially funded by a generous gift of Charles Simonyi to ...

NASA has responded to claims – popularized by Harvard professor Avi Loeb – that the interstellar object 3I/ATLAS is a spacecraft sent to the Solar System by an advanced alien civilization. On July 1, ...