Learn how to find the planets and constellations that are visible in York's September night sky during three shows presented Friday by the York County Astronomical Society.

* In the new full-dome planetarium program "Flight Adventures," dreams of flying, model aircraft and a young girl and her grandfather come together in a planetarium show about the science of aeronautics. Show begins at 7 p.m.

* In "StarWatch," become a star watcher by exploring the current night sky, locate visible planets and constellations, and enjoy some sky lore. Those attending will receive a star map. Show begins at 7:40 p.m.

* When you look into the sky, the background not-quite-blackness is filled with the diffuse light of stars lost in the space between galaxies. These are the "Cosmic Castaways." The full-dome planetarium show will describe how these stars are pulled from their homes and their fate lost in the space between the galaxies. Show begins at 8:20 p.m.

The planetarium is located in the York Learning Center, 300 E. Sixth Ave. Admission is $4 for adults, $3 for children and seniors. Admission to any second or third show is $1 each.