Custer Institute and Observatory is Long Island's oldest public observatory - open from 7 pm to midnight on Saturdays!
Explore the night sky with our volunteers, powerful telescopes, tours, and live events.
Join us every Saturday night for public observing sessions, where you can explore the cosmos through our powerful telescopes.
When the skies are clear, our knowledgeable volunteer staff will guide you on a tour of the stars, planets, and beyond.
Saturday Night Public Observing
Doors open at 7 PM
Observing from dark until midnight (weather permitting)
All observing takes place outdoors—please dress appropriately. Seasonal hours and times of darkness may affect skywatching times.
EVENTS
Outdoor Events: Most events take place on our lawn. We encourage you to bring a blanket or chair to make your experience more comfortable.
Rain Dates: Rain dates (when necessary) will be noted on our website, social media, and/or Eventbrite for your convenience.
STARGAZING NIGHTS @ SILVER SANDS
Friday, May 15. 8:00-10:00pm
Enjoy a special night of stargazing on the beach in partnership with Silver Sands Greenport!
Join us on Friday, May 15th from 8pm-10pm for an evening of springtime stargazing at Silver Sands, hosted at The Boathouse at 1400 Silvermere Road in Greenport. Guided by the team from Custer Observatory, guests will explore stars, planets, and distant galaxies through high-powered telescopes set along the beach overlooking Pipes Cove. With darker skies later in the evening, Arcturus will be the standout star overhead. Mars and Jupiter will also be visible, and if seeing conditions allow we may be able to get a view of the Beehive Cluster (M44).
To keep the night comfortable, complimentary hibiscus iced tea, cosmic brownie bites, and blankets will be available as you take in the sky above. Admission is $15 for adults and $5 for children, with all proceeds directly supporting Custer Observatory and its mission to bring astronomy to the community.
Turn the experience into a full evening by pairing stargazing with dinner at The Boathouse before or after the program. Space-themed films will be playing on the jumbo TV, extending the atmosphere well beyond the shoreline. Whether you are deeply familiar with the night sky or simply curious, this is an intimate and memorable way to spend a late winter evening on the North Fork.
Space is limited so reserve now! Note: This is a weather-permitting event. In the event of overcast skies or rain, the event will be postponed and held on Friday May 22, 8:00pm. Notifications will be posted here and on Eventbrite. If unable to attend, full refunds can be issued upon request.
RoSMF presents KINETIC CONTINUUM!
Saturday, May 30. 6:30pm-7:45pm
Kinetic Continuum is a Rites of Spring Music Festival “New Music Under the Big Sky” performance that will take you on a journey—an immersive musical experience like nothing you have experienced before. Featuring Light Painting Artist, Alina Wilczynski, and Rites of Spring Founder Paolo Bartolani on piano, this unique and experimental multi-media collaboration presents a very exciting evening of music, performance and stargazing.
Whether you're a classical lover or a lover of extraordinary experiences, Kinetic Continuum pushes the boundaries of a traditional music event. Wilczynski will prompt you to explore the idea that every action, thought and imagining—in the form of energy and sound, light and color—leaves a trail of its existence, its expansion over time and its intertwining with every other action, thought and imagining.
With an inward vision, if we allow ourselves to observe what these light and color paths might look like in the space around our bodies and our thoughts, as well as around our planet as one small speck in an ever-expanding cosmos, the process of creating and sharing our dreams, our passions and wonderings would take on an entirely new form—as brilliantly beautiful light art in perpetual outward motion!
The event will begin with a fascinating, informative and illuminating talk about the camera technique known as Light Painting. And following the performance, Observatory staff will provide guided tours of the night sky (weather permitting) through the many telescopes on site, including the apochromatic Zerochromat telescope in our historic observation dome.
$45 Adult, $30 Custer Observatory Members and Friends of R o S, Children Under 16 FREE. Attendance to this in-person performance will be limited - reserve your seats early!
This presentation will be held indoors.
PROGRAMS + RESOURCES
-

WEATHER
Clear Skies Ahead!
Find the latest weather forecasts tailored for astronomers, including cloud cover, precipitation, dewpoint, wind conditions, and Moon phases. Our easy-to-read key helps you decide if it’s a perfect night to bring out your telescope!
-

THE MUSIC PROJECT
Bring music and stargazing together at Long Island’s oldest public observatory, tMP blends the performing arts with science and discovery. A unique stargazing experience follows each performance where audiences are invited to explore the night sky with guidance from our expert volunteer staff, using our historic observation dome and an array of on-site telescopes.
-

WHAT'S UP?
Skywatching highlights each month, provided by NASA.
-

RESOURCES
Whether you're a seasoned astronomer or just starting your journey into the cosmos, our collection of resources will help guide you.
-

SCHOLARSHIP
Supporting the Next Generation of Scientists & Innovators. Available to High School Seniors throughout the North Fork.
-
HONEY BEE CLUB
Custer's Honey Bee Club is an educational program focused on environmental sustainability and honeybee stewardship.
Send an email to learn more.
Support the North Fork Dark Sky Coalition
Take action to protect our night skies:
Pledge to turn off unnecessary lights and spread awareness,
Update Your Lighting by using dark sky-friendly fixtures and warm-toned bulbs, and
Become a Partner to advocate, educate, and support local Dark Sky initiatives.
Take the pledge and join the North Fork Dark Sky Coalition
AFFILIATIONS + SUPPORTERS + PARTNERS
Stay in our universe.
Sign up for exclusive updates and news on events, programs, lectures, and live music
—no black holes of spam, just stellar content
delivered to your inbox. Subscribe.
