A comet that hasn’t been seen since Neanderthals and mammoths were alive will make its closest approach to Earth this month — and we won’t see it again for another 80,000 years.
Comet C/2023 A3 Tsuchinshan-Atlas will pass just 44 million miles from Earth on October 13, and it should be bright enough to see with the unaided eye. This comet only passes through the inner Solar System once every 80,000 years, so it’s a once-in-a-civilization sight.
