3199 Columbus Pike (U.S. 23), Delaware. (The observatory will be closed Jan. 5 and Jan. 12) Content varies based on sky conditions but may include a planetarium show, observatory tours, and stargazing with the 32-inch Schottland Telescope. Advance tickets are $10 for adults, $8 for children and senior citizens. Reserve tickets by calling (740) 363-1257. Learn more at www.owu.edu/perkins.