Steward Observatory nightfall

Steward Observatory atop Kitt Peak in Arizona. Telescope left is the 36 inch from which the Crab optical Pulsar was discovered by Morgan and his colleagues back in 1969 and from which he saw and photographed his first galaxy i. The middle one is the 90-inch Bok Telescope from which Morgan studied galaxies by eye and which later led him to the whole business of Hidden Galaxies. This image is used as the cover for my novel Whispering Sky (Amazon 2020)