If you are mailing in your membership form, please make sure it includes your Email Address so that we may contact you, confirm your information, send you the members password, and invite you to our Yahoo! group.

If you are paying via PayPal, please make sure you complete the Online Form that is displayed once you COMPLETE your PayPal transaction. This will collect the information we need to process your application, contact you, send you the members password, and invite you to our Yahoo! group.

You can pay dues online here:


If you prefer to Mail Dues, Click here: YCAS Membership application 

        FAQ: How much is the membership and what are the benefits?

Membership in The YORK COUNTY ASTRONOMICAL SOCIETY is $10 for Students, $20 for a single person membership, or $30 for Single family Household membership per year and includes:

  • 12 monthly issues of the YCAS newsletter, the “SPECTRUM ONLINE”

  • Access to  the Observatory and telescopes.

  • Free Planetarium shows to YCAS members.

  • Membership in The Astronomical League, The benefits of ALCOR , a national association of astronomy clubs.

  • 4 quarterly issues of The Astronomical League’s newsletter, “Reflector”.

  • A 25% discount on the subscriptions to “Sky and Telescope” magazine ($33/Year) if you add it to your dues at signup.

  • Free to YCAS Members YCAS Astronomy classes.

  • FREE admission to the club’s Mason-Dixon Star Parties (a $50 value).

  • Discounts on books and various other publications through The Astronomical League.

  • Use of the club’s library of technical and reference books, slides, and videos.

  • Use of  several of the club’s 8 inch Dobsonian telescopes and Solar telescope which are available for sign out use.  

  • Access to the Members Only Section of the Website.

  • Members Yahoo e-mail group.

  • Members Dark Sky Trips.

  • Members Meetings  and Events. Read a sample of previous YCAS meeting topics: YCAS Sample

  • Adult members (over 21) can vote on all Society concerns and are eligible to be elected as a Society officers. Student membership excluded.

  • Learn from some of the areas most experienced observers.

Learn and share with the fastest growing astronomy society in Pennsylvania. YCAS is involved in the surrounding communities with a science outreach program geared to bringing astronomy to the public such as Scouts, retirement communities, schools and  individuals with an interest in learning basic to advanced astronomy.

Attend a meeting and ask for any club officer for more information.

E-mail: E-Mail YCAS for more information.

Formed in 1989, the non-profit York County Astronomical Society aims to promote interest, public education, and advancement of the science of astronomy. In addition to planetarium shows, the society presents regular public sky watches and astronomy classes.