The interstellar comet 3I/ATLAS changed significantly as it flew by the sun last fall, astronomers have discovered.

A comet born around another star is carrying methane, and the chemical details of that methane are unlike anything ...

Learn how Comet 3I/ATLAS began to emit methane as it approached the sun, releasing compounds contained within its inner ...

Interstellar comet 3I/ATLAS is now on its way out of our solar system, never to return. The comet was only the third-ever ...

A new intriguing study of the interstellar visitor 3I/ATLAS has revealed that the object’s chemical composition shifted ...

"We estimated an outflow from the comet's nucleus of about two tons per second, equivalent to approximately 70 Olympic ...

Observing the interstellar visitor after its closest approach, astronomers found that its composition appears to have changed ...

Add Yahoo as a preferred source to see more of our stories on Google. Remember 3I/ATLAS? Yes, the interstellar comet that made plenty of headlines in 2025 is still romping through our solar system.

Scientists observe interstellar comet 3I/ATLAS releasing massive water vapor near the Sun, revealing clues about material ...

Usually, comets are dormant blocks of rock and ice. They only wake up when they get close to a star. The intense heat causes ...

Remember 3I/ATLAS? Yes, the interstellar comet that made plenty of headlines in 2025 is still romping through our solar system. But it may not be around much longer. The otherworldly visitor to ...