The tricky part of running a museum dedicated to outer space is that regular daytime hours hide the object of our wonder: the night sky. That script gets flipped with Adler at Night, a weekly opportunity to visit the Adler Planetarium after dark (or what counts for dark in downtown Chicago), with free general admission for Illinois residents. The exhibits and sky shows are always worthwhile, but once the sun sets (and weather permits) on Wednesdays, step outside to gaze at the moon and planets. Peek through the standard portable ’scopes on the observation patio, then take a short walk around the planetarium to its east side, where the Doane Observatory sits in its own building. Nothing beats a peek at Saturn’s rings through the viewfinder of the largest publicly accessible telescope in northern Illinois. Psst: The unique view of the city skyline from the edge of the Museum Campus peninsula is stellar, too. 1300 S. DuSable Lake Shore Dr., Museum Campus