Blink and you might miss your chance to see this once-in-a-lifetime comet. Here's how to make sure you catch a glimpse. When you think about once-in-a-lifetime events, you probably think of weddings, ...

It was early January 2025 when a faint light spot was observed at the Mt. Lemmon Observatory in Arizona. Follow-up observations revealed that the object was a comet visiting from the outer edge of the ...

Comet C/2025 R2 (SWAN) will make a close flyby of Earth on Oct. 21. A bright new solar system comet could put on a show in the October night sky as it zooms past Earth. Comet C/2025 R2 (SWAN) was ...