The York County Astronomical Society (YCAS) will host a Starwatch event at their Observatory at John Rudy County Park, on the second Saturday of the month, at 7:00PM to 9:00PM to view the night sky through our telescopes. Expand your mind by taking in the expanse of the universe. Come view the evening sky with us through one of our telescopes. Let our experienced members guide you on a tour of celestial wonders, including stars, and nebulae. ...

The York County Astronomical Society, celebrating 20 years offering planetarium programs to the public, now offering Saturday afternoon and evening programs at the York Learning Center Planetarium. Saturday, January 24, 2026 2:00PM - One World, One Sky: Big Bird’s Adventure (pre-K to 1st grade) 2:40PM - StarWatch 3:20PM - Max Goes to the Moon (K to 2nd grade) The planetarium is located in the York Learning Center at 301 East 6th Avenue, York PA. ...

The York County Astronomical Society, celebrating 20 years offering planetarium programs to the public, now offering Saturday afternoon and evening programs at the York Learning Center Planetarium. Saturday January 24, 2026 7:00PM - A Part of the Sky Called Orion 7:40PM - StarWatch 8:20PM - From Earth to the Universe The planetarium is located in the York Learning Center at 301 East 6th Avenue, York PA. ...

WELCOME TO THE YCAS RADIO OBSERVATORY OUR 3 METER RADIO TELESCOPE IS OPERATIONAL FIRST LIGHT: in the early morning hours on October 31st 2024 we achieved first light. Observing in the spectral mode we captured some very nice concentrated areas of neutral hydrogen in the region of Orion. The three peaks you see in this spectrograph are three arms of our Milky Way galaxy! OPERATIONAL BUT NOT COMPLETE: although operational there’s still much work to be done to complete the project from mechanical and software upgrades to final touches in the control room. ...

The York County Astronomical Society (YCAS) has an active group of members doing astrophotography where they share their experience and joy of the hobby. The Andromeda galaxy is located near the constellation of Cassiopeia. This Photo of the Andromeda Galaxy (M31) was taken with Wiliam Optics GT71 and William Optics FTL 91 scopes and the ZWO ASI 2600MC Astrophotography Camera. This composition was taken with 30 hours of exposures. Photo credit of Don Emmel. ...