There’s a delight waiting for you in the night sky. Comet A3 has been visible in the early night sky for the past several nights. C/2023 A3 (Tsuchinshan–ATLAS), which measures about 2 miles in diameter, is passing about 44 million miles from Earth. To see it, look toward the western horizon about 45 minutes after sunset. It should be visible for the next week or two. Comet A3 was just discovered last year, and there’s a pretty good reason: It only comes this close to Earth every 80,000 years!
