Interstellar comet 3I/ATLAS was almost called 3I/Rubin, after researchers found that the giant survey telescope ...

A medieval monk may have beaten Edmond Halley to one of astronomy’s greatest discoveries by nearly 700 years. Researchers say ...

In a stunning stroke of luck, Hubble witnessed a comet splitting apart almost in real time. The rare observation is giving ...

A rare comet from another star system is revealing just how different alien solar systems may be from our own.

The presence of deuterium, an isotope of hydrogen, in 3I/ATLAS suggests the interstellar comet formed in a much colder place before our solar system existed.

The water coming off comet 3I/ATLAS is not just unusual. It is extreme. Astronomers studying the interstellar comet found that its water is packed with an unusually heavy form of hydrogen called ...

"This dust can penetrate the shielding of the solar system and end up on Earth." When you purchase through links on our site, ...

In September 2012, Russian astronomers Vitali Nevski and Artyom Novichonok discovered Comet C/2012 S1; as they were using a telescope from the International Scientific Optical Network, the comet was ...

Astronomers have revealed that the interstellar comet 3I/ATLAS, officially discovered on July 1, 2025, was actually captured ...