New data reveal interstellar comet 3I/ATLAS is a 'pristine' object rich in alien metals and carbon. Scientists uncover its ...

Most comets show green or blue light near sunlight. This colour comes from gases reacting to ultraviolet exposure. But Comet ...

Astronomer Gianluca Masi captured breathtaking imagery of solar system comet C/2025 K1 (ATLAS) breaking into multiple pieces after being warmed by the sun.

Take a journey to the outer edges of the solar system and discover how planets, comets, and icy fragments form an invisible ...

Nearly a century after Pluto’s discovery, astronomers are still hunting for mysterious planets beyond Neptune - including a ...