Observatory · Est. 1952
Peer through instruments that have watched the heavens for seven decades. Join us under the darkest skies on the eastern seaboard.
Our Heritage
Perched at 1,200 meters on Mount Aethelgard, the Celestis Observatory has served as a beacon for astronomical research and public education since 1952. Our original 24-inch Clark refractor still draws gasps on clear nights.
Today, our research team contributes to exoplanet detection, near-Earth asteroid tracking, and spectroscopic surveys — while welcoming over 15,000 visitors each year to share in the wonder of the night sky.
72
Years Active
15K+
Annual Visitors
340+
Clear Nights/yr
Seasonal Programme
From meteor showers to planetary oppositions, our calendar aligns with nature's rarest performances. Each event includes guided observation and expert commentary.
August 12, 2025 · 9 PM — 2 AM
The most anticipated meteor shower of the year. Up to 100 meteors per hour under our Bortle-2 skies. Includes warm drinks, blanket service, and live commentary from our resident astronomer, Dr. Elise Marchetti.
Sep 7
2025
Saturn reaches peak brightness — view its rings through our 24-inch Clark refractor. Workshop includes astrophotography basics and ring dynamics lecture.
Sep 27, 2025
An all-night session targeting 40 Messier objects. Warmth stations, hot cider, and prize for most objects logged.
8 PM — 5 AM · $40Oct 21, 2025
Halley's Comet debris lights up the sky. Perfect for families — shorter session, earlier start time.
7 PM — 11 PM · $22Dec 14
2025
Our grand annual event. Multi-colored meteors, live chamber music under the stars, premium telescope access, and a seasonal dinner. Limited to 120 guests.
Our Instruments
Three primary instruments — each a window into a different layer of the cosmos. All maintained to research-grade precision.
Primary · Since 1952
24-inch f/15 Alvan Clark & Sons
Our crown jewel. Hand-ground optics from the legendary Clark workshop deliver razor-sharp planetary and lunar views. Fully restored in 2018 with modern goto mount.
24"
Aperture
f/15
Focal Ratio
Research · Since 2003
32-inch f/4 Ritchey–Chrétien
Our workhorse for deep-sky imaging and spectroscopy. CCD-equipped with automated data pipeline for exoplanet transit detection.
32"
Aperture
f/4
Focal Ratio
Solar · Since 2019
90mm H-alpha Solar Telescope
Dedicated solar observation in H-alpha. Real-time prominences, flares, and sunspots. Open for daytime public sessions every clear day, 10 AM — 2 PM.
90mm
Aperture
Captured at Celestis
Plan Your Visit
The observatory is open to the public Tuesday through Sunday, year-round. Evening sessions begin at dusk. Reservations are strongly recommended, especially for event nights.
Location
Mount Aethelgard Road, 1,200m elevation
Clearwater Valley, NJ 07860
Hours
Tue — Sun: dusk to midnight
Solar sessions: 10 AM — 2 PM (clear days)
Admission
General: $18 · Members: Free
Children (6–12): $8 · Under 6: Free
Weather Guarantee
Clouded out? Your ticket is automatically valid for the next clear-night session at no extra charge. No one leaves without seeing stars.
Book a standard visit or an event night. We'll confirm by email within 24 hours.
Support the Stars
Celestis is a nonprofit observatory. Memberships fund telescope maintenance, educational programs for underserved schools, and the preservation of our dark-sky status against encroaching light pollution.
Every membership includes unlimited free admission, priority booking for events, a quarterly sky calendar, and invitations to members-only observation nights with visiting astronomers.
$60
Annual · Individual
$120
Annual · Family
$500
Patron
"The sky is the ultimate shared heritage."
— Dr. Elise Marchetti, Resident Astronomer