Amateur Astronomers Association of Princeton logo
Beginning with the September 9th, 2014 Peyton Hall meeting and going forward, the monthly meeting will commence at  7:30 P.M.

Atacama Large Millimeter/submillimeter Array (ALMA)

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.

Read about the AAAP in this article from a recent issue of Princeton U.S. 1.

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Fourth Dimension Astroimaging...My Personal Journey Through the Cosmos' by Steve Mazlin, MD
Tuesday, November 11, 2014 at 7:30 p.m at Peyton Hall - Princeton University

Astrophotography was revolutionized by digital techniques over the past 20 years. Steve Mazlin explains some of the basics of data acquisition and processing, while also giving a glimpse into the world of remote imaging, and showing some of his favorite images.

Steve Mazlin lives in eastern Pennsylvania with his wife, Violet, and his 2 sons. When not actually acquiring or processing astronomical images, he's usually thinking about acquiring or processing images. Somehow he finds time for his other familial responsibilities (though Violet may argue this point), and time to be a neurologist in a busy private practice. His colorful images have appeared in numerous magazines, and also on NASA's Astronomy Picture of the Day (APOD) website. In 2009 he had a one man show at the Monmouth Museum in Lincroft, NJ. Some of his images are part of the travelling exhibit, "Starstruck: The Fine Art of Astrophotography", coming to the Michener Museum in Doylestown, PA this November.

His personal website is    His alter ego, Mazlini The Great, can be found at

Steve Mazlin

September 2014 through June 2015 Monthly Meeting Season (at Peyton Hall)
Peyton Hall (right) is the location of the 2014 - 2015 AAAP monthly meetings. The building is home to the Department of Astrophysical Sciences, and is located just east of Washington Road, adjacent to Palmer Stadium, 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 (first floor) of Peyton.   

Meetings start with brief announcements of general interest, followed by a guest speaker presentation.  After the guest speaker, the general meeting commences, reviewing current and future club activities, astronomy news, and public outreach projects.   Regular attendees of the lectures are encouraged to become paid members to support these popular speaking events.  Please email the AAAP for additional details.
Princeton University students also host a telescope open house at Peyton Hall concurrent to the end of our meeting. If the sky is clear, stop up to glimpse the universe.

Peyton Hall

The AAAP Observatory Weekly Open House   ( 2015 Season Begins Friday Evening, April 3rd. 2015 )

The Simpson Observatory Public Open House schedule has ended, for the 2014 season..  Our thanks to all the guests who visited us during this observing year.
Public nights will resume April 3rd, 2015.   The facility is located in Washington Crossing State Park, a few miles outside Pennington, NJ.

Guests are shown a myriad of astronomical wonders including planets, The Moon, galaxies, nebulae, star clusters and much more. Learn the seasonal constellations and how to identify them.  AAAP astronomers operate a 6.25" Hastings Byrne refractor and a research-grade Celestron 14" Schmidt-Cassegrain on a Bisque Paramount ME mount.  AAAP members often set up additional equipment adjacent to the observatory. Visitors are welcome to bring telescopes.

For directions, and further details, please visit the observatory page.

Mouse over any image for an accompanying caption.

 AAAP 50th Anniversary Gala Sponsors