Free Admission Thursday at The Coit Observatory - see INFO below. Hours: 7:30 pm (Winter) 8:30 pm (Summer). The Public Open Night at the Observatory is a chance for people to come observe the night sky through telescopes and see things they otherwise might not get to see, and learn some astronomy as well. We have run the Open Nights since 1967.The Open Nights are held most Wednesday evenings throughout the year, weather permitting. More Info below.