For millions of years, a fragment of ice and dust drifted between the stars—like a sealed bottle cast into the cosmic ocean.

The interstellar comet 3I/ATLAS does not come from our corner of the Milky Way, and may be a time capsule of the early galaxy ...

Every once in a while, our solar system receives a fleeting visitor from the depths of our galaxy. On July 1, 2025, NASA’s ...

NASA's Perseverance Mars rover may have captured an image of interstellar comet 3I/ATLAS streaking across the sky above the ...

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

New photos of the mysterious interstellar object 3I/ATLAS taken from Mars have reignited theories that it could be an alien spacecraft.

The comet is one of only three of its kind recorded in history. But others think there could be more to this celestial object ...

Observing 3I/ATLAS in this active phase will give some of the clearest insights yet into the mystery of interstellar comets.

The entire progression will be observed by the ESA’s orbiters the Mars Express and ExoMars Trace Gas Orbiter as well as ...