Comet 3I/ATLAS arrived from beyond the Solar System carrying a chemical story unlike anything astronomers had measured before ...

Here’s how to keep your 3I on it. With 3I/ATLAS slated to make its Earth tour in two days, amateur photographers and astronomers alike are scrambling to catch sight of the interstellar comet. Our ...

Cropped image of NASA’s James Webb Space Telescope observation of comet 3I/ATLAS with its Near-Infrared Spectrograph ...

A team of international astronomers, including a University of Michigan doctoral student, were the first to publish the discovery of just the third known interstellar object to visit our solar system ...

Harvard astronomer, Avi Loeb, speculates it could be an artificial alien object. NASA experts maintain that the object appears to be a natural comet with unique variations. Rare interstellar object 3I ...

Is 3I/ATLAS following its heart? Harvard scientist Avi Loeb believes that 3I/ATLAS boasts a “heartbeat”-like pulse that could provide evidence of its artificial origins — potentially even pointing to ...

A deep image of interstellar Comet 3I/ATLAS captured by the Gemini Multi-Object Spectrograph (GMOS) on Gemini South at Cerro Pachón in Chile, one half of the International Gemini Observatory and ...

Astronomers have used the European Southern Observatory's Very Large Telescope (ESO's VLT) to study the composition of ...

A mystery interstellar object discovered last week is likely to be the oldest comet ever seen—possibly predating our solar system by more than 3 billion years, researchers say. The "water ice-rich" ...

While 3I/ATLAS is definitely a comet, its composition and age have remained unclear. Now, astronomers have solved these ...

We already knew interstellar comet 3I/ATLAS came from somewhere far beyond our solar system. Now scientists have more information on how alien that somewhere really is — a corner of the universe ...

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. A deep image of interstellar Comet 3I/ATLAS captured by the ...