The York County Astronomical Society (YCAS) will offer planetarium programs on Saturday, May 18. The planetarium is located in the York Learning Center, 301 E. Sixth Ave., York.

YCAS will hold the children's programs "One World, One Sky" at 2 p.m. and "Rusty Rocket's Last Blast" at 3:20 p.m. Adults are invited to attend "From Earth to the Universe" at 7 p.m. and "Hot and Energetic Universe" at 8:20 p.m. StarWatch programs will be held at 2:40 and 7:40 p.m.

There is an admission fee, with a discount for children and seniors. Admission to any second or third show is discounted. Cash and most credit and debit cards are accepted. Private show reservations are available.

To learn more about YCAS, visit http://www.astroyork.com.