Amateur Astronomers Association of Princeton logo


Artist's rendition New Horizons Probe near Pluto

Enthusiasm for observational astronomy, curiosity about cosmology, achievements with CCD imaging and technology. These and all other aspects of astronomy are interests shared by members of the Amateur Astronomers Association of Princeton. The club is based in Princeton, (Mercer County) New Jersey.

This organization of 100 + promotes astronomy-related activities for members and non-members, novice to expert.  A wide spectrum of astronomy interests are explored at the AAAP through regular meetings, workshops, use of the two club observatories, public outreach and regional star parties.


Come explore our web site.  Here you'll find details about our organization's meetings, discussion topics, members and their scopes, and a lot more. Our organization maintains two observatories: the larger in Washington Crossing State Park (housing a research-grade 355mm Schmidt-Cassegrain catadioptric and historic 159mm Hastings-Byrne refractor). A second facility is found at Jenny Jump State Park in northwestern New Jersey. This houses a 318mm custom-built Newtonian reflector.

AAAP photos --------->    Flickr site!

Current Summer Observatory Public Night Updates -------->  On Twitter!

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Sidereal Times, our monthly newsletter, is now exclusively digital. Access your copy here.

Click here to get today's latest astronomy and space news!






The AAAP Invites the Public to the Simpson Observatory, Washington Crossing State Park (NJ side)
Each Friday Evening -- Weather Permitting
Friday evenings, 8:00 PM until 11:00 PM -- clear skies permitting

Come visit the Universe at our state-of-the-art astronomical observatory, located near Pennington, NJ just minutes from I-95. AAAP astronomers will show you galaxies, planets, ghostly nebulae, spectacular globular clusters and jewel-box open star clusters. Using our research-grade Celestron 14" Schmidt-Cassegrain OTA mounted on a Paramount Robotic Mount and historic 6.25" Hasting-Byrne refractor, you'll see the night sky like never before.

** New for 2015! ---> We've installed a Mallincam Astronomical Video Imaging System. View deep sky objects on a large LCD screen.

Click here for current Friday night opening updates (go / no-go).

Click here for observatory description..

Celestron 14 SCT



MONTHLY MEETING LOCATION CHANGES TO BOWEN HALL STARTING JANUARY 13, 2015

Bowen Hall is the location of the 2015 - 2016 AAAP monthly meetings.
Bowen Hall is located on Prospect Avenue next to North Garage within the Engineering Quadrangle complex on the Princeton University campus.  
Meetings are on the second Tuesday of each month
and begin promptly at 7:30 PM in the lecture hall.