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Planetarium Shows April 10th and 11th Shows. See: Planetarium

Free Astronomy Day and Public Observing Night April 25th. See: Astronomy Day. See: Astronomy Day. See: Public Observing.


The Jellyfish Nebula

The excellent image above of the Jellyfish Nebula was photographed by YCAS member Butch Kimmel from Hanover, Pennsylvania on February 20, 2015. The Jellyfish is a supernova remnant in Gemini. The progenitor star exploded 3,000 - 30,000 years ago. Nice filamentary detail in this one. It is about 5,000 light years away and is a good example of a supernova remnant interacting with a surrounding nebula. See larger image and Telescope/Camera details. See: Jellyfish Nebula


Jupiter and two of its Moons

YCAS member Butch Kimmel captured the above image of Jupiter and two of its Moons, IO seen closest to Jupiter and Europa farther out seen in bottom right side corner. Image taken from Hanover, Pennsylvania with an eight inch, 1600mm Ritchey-Chretein telescope, projecting the view through a 16mm eyepiece to achieve the equivalent of a 15,200mm lens at f/76. Canon 600D with Astronomik ProPlanet 742nm Infra Red Pass filter. About 800 frames stacked.



Image below of planet Jupiter by YCAS member Mike Wenz on November 8, 2013 showing the Great Red Spot. 

Image details:

Jupiter imaged on 11/9/13 at 4:24 am through a 10 inch Newtonian telescope. A DMK21af CCD camera was used with a Wratten #38A filter.

YCAS Speakers available

YCAS is available for educational and speaking engagements. YCAS speakers are members on a volunteer basis and therefore limited to evenings and weekends. Contact YCAS at: E-Mail YCAS


YCAS Member Discovers Asteroids

YCAS member John Sachs discovered two new unknown asteroids. For more information of discovery and animations see: Discovery


Observing The Moon

Mike and the Moon

Below is an image of the lunar crater Schiller taken by YCAS member Mike Wenz. It was taken at the YCAS observatory at John Rudy Park in York, PA using the York County's LX-200 telescope and his  DMK21AF04 CCD camera. The images were stacked using around 1000 exposures out of 1500 exposures and processed using Registax. See: Lunar images


Imaging The Moon

Below images by Michelle Wenz showing sunrise on the Lunar surface. Animation was made from Michelle's images. See More here: Lunar Sunrise

York County, Adams County, Pennsylvania Astronomy The Scout Merit Badge Program

I stood and stared; the sky was lit,
The sky was stars all over it,
I stood, I knew not why,
Without a wish, without a will,
I stood upon that silent hill
And stared into the sky until
My eyes were blind with stars and still
I stared into the sky. --Ralph Hodgson (1913)

The York County Astronomical Society, Located in York, Pennsylvania

The York County Astronomical Society, Inc. is a non-profit organization dedicated to the advancement of the science of astronomy.

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