The once-in-a-lifetime comet “orbits the sun only once every 80,000 years,” one that was last seen by the Neanderthals. But ...

The once-in-a-lifetime comet “orbits the sun only once every 80,000 years,” one that was last seen by the Neanderthals. But ...

The best comet of the year is starting to fade in brightness, but it’s still an easy naked-eye object in the evening sky.

The once-in-a-lifetime comet “orbits the sun only once every 80,000 years,” one that was last seen by the Neanderthals. But tonight, there will also be a supermoon to see. Here’s more.

A rare comet is still glowing over Ohio. Here's how to see it before it's gone, and won't return for 80,000 years.