Comet A3 hasn't been past Earth since the Neanderthals. It'll be visible across the Northern Hemisphere in October; here's ...
N​ow is your once-in-a-lifetime chance to view one spectacular comet soaring across the night sky. Comet Tsuchinshan-Atlas, ...
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.