Guest Speaker

Dr. Mario Motta
The December 2023 AAAP meeting will be on the 12th at 7:30PM in Peyton Hall auditorium (Room 145), Princeton University. Dr. Mario Motta, a cardiologist and past president of AAVSO, uses his home-built 32” telescope to image various objects and to study variable stars. He will talk about building his telescope and the observations he makes with it.

Observatory News

The observatory is closed until April.

The AAAP Observatory, Washington Crossing State Park (NJ side) will open to the public at sunset every Friday evening from April through October IF the sky is clear.

For complete details about visiting the AAAP Observatory, please click on the "more" button just below.

Weather & Moon

Outreach & Education

One of the purposes of the AAAP is to educate the public about the wonders of the universe over our heads through our lecture series and outreach program.

Our astronomers setup telescopes for public use at Communiversity in Princeton, Super Science Saturday at the NJ State Museum in Trenton and at various public events around Mercer County.

We will bring telescopes to your school or educational event to show and explain objects in the night sky like the Moon, constellations, planets, nebulae and galaxies.

Sidereal Times

Sidereal Times is the official newsletter of AAAP since 1962.

Published in blog form now, it is the best source of current news about club activities. In addition, we publish essays, gear evaluations, astrophotographs, book and movie reviews, poetry, travelogues and technical articles related to our hobby.

AAAP plans to post on this website soon our archive of all issues going back to the club's founding. We hope to complete this project soon.

Connect With Us

AAAP is eager to answer your questions about our facilities, activities and astronomy in general. Please mail us at

Please call at 609-737-2575 for observatory status on Friday nights between 8:00 and 11:00 pm. If no one answers, it is definitely closed. Openings are tweeted on Fridays, as soon as we know that the weather will cooperate.