Comet 41P slowed its rotation to a halt and then began spinning in the opposite direction, surprising scientists.

The fate of a comet that was predicted to pass close to Earth remains a mystery five years after its dramatic breakup in the inner solar system.

New infrared observations reveal that the rare interstellar visitor known as comet 3I/ATLAS has dramatically brightened during its farewell tour of the solar system.

By taking advantage of a maneuver that would see a spacecraft fire rocket engines while in the solar corona, that ...

Comet Wierzchoś, also known as C/2024 E1, is rapidly brightening as it approaches its closest point to Earth next week. But ...

Observations of interstellar object 3I/ATLAS show increased water, carbon dioxide, and organic gas release after its passage near the Sun, based on data from NASA’s SPHEREx mission ...

41P/Tuttle-Giacobini-Kresak is now known to be in the Jupiter family of comets, going from a little inside Jupiter's orbit to almost as far as Earth on its 5.4-year orbit. It is notable for its large ...

On February 17, the comet will make its closest approach to Earth from 94 million miles, roughly as far as the Sun.

Comets usually fade quietly once they swing past the Sun. Interstellar comet 3I/ATLAS did not follow the same path. Instead, ...

The cliffside collapse created about 2,000 tonnes of rubble, 99 percent of which settled at the foot of the precipice. In 2015, Europe's Rosetta spacecraft witnessed -- and photographed -- a big one ...

SPHEREx detected a mix of molecules streaming off the comet, including water ice, carbon dioxide, and rocky material.