Astronomy Magazine – Your source for the latest news on astronomy, observing events, space missions, and more.

Comet and cactus

John Vermette, taken from Saguaro National Park near Tucson, Arizona

Comet C/2023 A3 is pictured here Oct. 15. The image is a stack of twenty-six 3-second shots with a 50mm f/1.4 lens at ISO 3200.