Our solar system's famous "invader" might be as old as the Milky Way itself.

New data from the James Webb Telescope has identified an unusually high concentration of deuterium in the interstellar comet ...

Loeb set imaginations afire last year when he began raising questions about the object’s irregularities.

The European Space Agency (ESA) has released a video of interstellar comet 3I/ATLAS, constructed from images taken by a probe ...

Remember 3I/ATLAS? Yes, the interstellar comet that made plenty of headlines in 2025 is still romping through our solar system.

Could “alien water” be hiding in 3I/ATLAS? Harvard researcher Avi Loeb explains the discovery and how it could challenge ...

The levels of a heavy form of hydrogen in 3I/ATLAS are 30 to 40 times higher than in Earth's oceans, suggesting the comet has ...

Add Yahoo as a preferred source to see more of our stories on Google. The mystifying 3I/ATLAS interstellar comet is blazing toward Earth and will in a matter of days come as close to our planet as it ...

The interstellar comet 3I/ATLAS is leaving our solar system. See new photos from a European Space Agency orbiter on its way to Jupiter.

The comet 3I/ATLAS is taking a long holiday journey this year. It’s visiting from another solar system altogether. Those interstellar origins... What to know about the 3I/ATLAS comet and why people ...

The Post's complete guide to catching 3I/ATLAS as it makes its closest approach to Earth on December 19. Here’s how to keep your 3I on it. With 3I/ATLAS slated to make its Earth tour in two days, ...

The first reported observations of 3I/ATLAS were made to the Minor Planet Center on July 1 Jamie McCarthy/Getty;International Gemini Observatory/NOIRLab/NSF/AURA/K ...