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2018 Association Meetings: Peyton Hall (Dept. of Astrophysical Sciences), Princeton University

2018 AAAP meetings are held the second Tuesday of each month (through June 2018) at 7:30 PM. Members and guests gather at the Peyton Hall lecture theatre (first floor) on the Princeton University campus. Click Here for directions to Peyton Hall.

There is often a 6:00 PM pre-meeting dinner at a local Princeton restaurant; members and guests are welcome and encouraged to attend. Here, individuals get a chance to chat with the evening's guest speaker, and get to know their fellow AAAP members. For further information about attending the pre-meeting dinner, contact our Program Chair, Ira Polans..

Regular attendees of the lectures are encouraged to become paid members to support these popular speaking events. Please email the AAAP for additional details.

Here is a list of speakers from previous seasons.




AAAP Observatory Open Houses - 2018 Season
Washington Crossing State Park (NJ side)
Friday April 6, Through Friday October 26 - 2018

Come view the universe through our beautifully restored Hastings-Byrne refractor.  One of two scopes at the Simpson Observatory.
AAAP Observatory Open Houses


** Click here for -------->
OBSERVATORY DIRECTIONS.    (Do NOT use your mobile GPS. You WILL get lost).
** April 6, 2018 through October 26, 2018.    Sunset - 11:00PM
** 2018 public nights season, every Friday evening, weather permitting
** Located at Washington Crossing State Park (NJ side).
** Up-to-the-minute information (Twitter) whether observatory is open or not (weather-related)
- click HERE

The Amateur Astronomers Association of Princeton opens its observatory to the public starting Friday, April 6th, this year.   Anyone interested in the night sky is invited to visit.  Non AAAP members are welcome and there is no fee.      Here is sky map to bring along  (better than your blinding smartphone) !

Please note: Children must be supervised by an adult.  Due to restricted space and nature of the equipment, children must be closely supervised by parent or guardian.

Located in Washington Crossing State Park, the observatory houses a beautifully refurbished 6.25" Hastings-Byrne refractor and research-grade 14" Celestron Schmidt-Cassegrain reflector. During our open house season, guests can mingle with AAAP astronomers to view a myriad of celestial objects. Members frequently bring smaller instruments and set up around the main observatory. Guests are invited to do the same!   Have questions about visiting the observatory?  Email us -- we'll be glad to help!

The observatory phone is 609-737-2575.  You may call, if weather is variable, to see if we will open.

To confirm you are visiting on a public night, please call the observatory at: 609.737.2575.  If the observatory is open for that evening, a AAAP staff member will answer.   If the weather is questionable, and you keep getting the observatory answering machine after (the time of) sunset, it is likely the public night has been cancelled (**check our Twitter site**). However - clear nights permitting - we very much look forward to showing you some of the extraordinary sights in the universe.

The observatory is open for use at any time for members who are observatory keyholders (keyholders are required take a course in observatory operation and agree to be active with scheduled duty on public starwatch nights). AAAP members may contact observatory keyholders at any time to arrange an appointment to use the Simpson Observatory.