Join us for Astronomy 101, a public lecture series featuring engaging talks by experienced speakers covering the fundamentals of astronomy and modern space science. Each session is designed for general audiences, with time built in for questions and discussion. Who Should Attend? Beginners with no prior astronomy background, Amateur astronomers and space enthusiasts, families, students, and lifelong learners. Come explore the universe—one Saturday night at a time. Event Details: * starting May 9, 2026 @6pm * class at John Rudy Park Observatory ...

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 8:00PM to 10:00PM 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. ...

Radio Astronomy and Solar Observing at Astronomical Society The York County Astronomical Society (YCAS) will be offering an event at their Observatory at John Rudy County Park, 400 Mundis Race Road, York, on Saturday, July 18, 2026. Solar and Radio Astronomy from noon - 3:00PM. Society member Kerry Smith will be presenting the radio astronomy portion of the event as well as giving attendees a peek into the future of the Society’s radio astronomy endeavors. ...

The planetarium is closed until September 2026. For more information on events, scheduling a private party star watch, directions to the observing site, or for general Society information please contact us at info@astroyork.com or leave a voice message after the recording at 717 759-9227 or visit our Facebook page The Planetarium wishes to recognize and thank the British Fulldome Institute for programming support.

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. ...