A rare celestial event is lighting up the night sky this month as Comet Tsuchinshan-Atlas makes its closest approach to Earth for the first time in roughly 80,000 years.

Comet C/2023 (Tsuchinshan-ATLAS) is putting on a once-in-a-lifetime show. Here's how to see it before it leaves.

ATLAS, also known as C/2023 A3 or simply Comet A3, has emerged as one of the most impressive naked-eye comets this year. As the sun dips below the horizon on Tuesday evening, October 15, sky enthusiasts are poised for a treat.