The York County Astronomical Society (YCAS) will present several planetarium programs to the public on Saturday, Jan. 7. The programs will be shown in the planetarium in the York Learning Center, 301 E. Sixth Ave., York.

Geared toward children, "One World, One Sky: Big Bird's Adventure" will be presented at 2 p.m., and "Defying Gravity: It IS Rocket Science!" will be shown at 3:20 p.m. For older family members, there will be "A Part of the Sky Called Orion" at 7 p.m. and "Forward! to the Moon" at 8:20 p.m. StarWatches will be held at 2:40 and 7:40 p.m.

There is an admission fee, with a discount for children and seniors and admission to any second or third show. Cash and most credit and debit cards are accepted. Private show reservations are available. For details, visit http://www.astroyork.com.