Photos show that comet C/2025 F2 (SWAN) experienced a "major eruption," causing it to become temporarily brighter. However, ...

Here's an observers' guide to the newly discovered Comet 2025 F2 (SWAN), which is visible in northern skies right now.

There’s always another comet. Last year there was much ballyhoo over the so-called “devil comet,” some will-it-won’t-it drama of Tsunchinshan-ATLAS, and the sudden discovery (and quick ...

Because comets like C/2024 G3 (ATLAS) are made mostly of water ice, as they approach the inner solar system, that ice sublimates into a gas as it nears the sun to create a vast, willowy tail.