Comet 3I/ATLAS is only the third known object to barrel into our neighborhood from interstellar space, and it is already shredding old assumptions about how comets form, move, and even what they are ...

The interstellar visitor may still have a few things to tell us before it leaves our solar system.

Just days ago, NASA dropped a batch of new images of a comet from an entirely different solar system that has for months been a source of public fascination and speculation. The object, named 3I/ATLAS ...

Analysis of the second confirmed interstellar comet to visit our solar system suggests that the alien body could be covered in erupting icy, volcano-like structures called cryovolcanoes. Researchers ...

Space has a way of reminding us how little we actually know about the neighbourhood beyond our own front door. When a new visitor streaks through our solar system, scientists scramble to catch a ...

Scientists have found new evidence suggesting that interstellar 3I/ATLAS is not an alien spaceship, as one conspiracy theory ...

(CNN) — The latest images of an interstellar comet shared by NASA have captured how an array of spacecraft witnessed a flyby that was truly out of this world, revealing clues to the object’s ...

This summer, scientists spotted an incredibly rare visitor to Earth’s solar system—a comet, now known as 3I/ATLAS, that entered our solar system from the galaxy beyond and is zipping past the sun at a ...