Comet C2023 A3 Tsuchinshan-ATLAS is seen low in the sky near the village of Aguas Blancas, Uruguay, at dawn on Sept. 28. And this truly is your only chance to see it; NASA said the comet, dubbed C/2023 A3 Tsuchinshan-ATLAS, isn’t expected to come within viewing distance again for 80,000 years. NASA officials said the comet made its closest transit …