Space enthusiasts will get a big bang (pun!) out of the Adler. There are public telescopes to view the stars (10am to 1pm daily, by the Galileo Cafe), 3-D lectures to learn about supernovas (in the Space Visualization Lab), and the Planet Explorers exhibit where kids can 'launch' a rocket. The immersive digital films cost extra (from $13 per ticket). The Adler's front steps offer Chicago's best skyline view, so get your camera ready.