Comet A3 hasn't been past Earth since the Neanderthals. It'll be visible across the Northern Hemisphere in October; here's ...

The ancient comet—dubbed the “comet of the century”—returns to the inner solar system only once every 80,000 years.

Comet Tsuchinshan-Atlas (C/2023) is passing by Earth, and should be bright enough to see with the naked eye in the night sky.

Several people captured photos of the A3 comet over Cincinnati Thursday evening. It's a rare event that won't be visible for another 80,000 years after this month.

It should be visible through the end of October, clear skies permitting. Comet Tsuchinshan-Atlas should be bright enough to ...