Observatory · Est. 1952

Where the Cosmos
Meets Curiosity

Peer through instruments that have watched the heavens for seven decades. Join us under the darkest skies on the eastern seaboard.

Next Event

Perseid Meteor Shower Night

August 12, 2025 · 9 PM — 2 AM

Celestis Observatory dome silhouetted against the night sky

Our Heritage

Seven Decades
Under the Stars

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

Upcoming Celestial Events

From meteor showers to planetary oppositions, our calendar aligns with nature's rarest performances. Each event includes guided observation and expert commentary.

Perseid meteor shower streaking across the night sky
Featured

August 12, 2025 · 9 PM — 2 AM

Perseid Meteor Shower Night

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.

Reserve Your Spot $35 / person

Sep 7

2025

Saturn Opposition Workshop

Saturn reaches peak brightness — view its rings through our 24-inch Clark refractor. Workshop includes astrophotography basics and ring dynamics lecture.

7 PM — 11 PM · $28

Sep 27, 2025

Harvest Moon Deep-Sky Marathon

An all-night session targeting 40 Messier objects. Warmth stations, hot cider, and prize for most objects logged.

8 PM — 5 AM · $40

Oct 21, 2025

Orionid Meteor Shower & Stargazing

Halley's Comet debris lights up the sky. Perfect for families — shorter session, earlier start time.

7 PM — 11 PM · $22

Dec 14

2025

Geminid Meteor Shower Gala

Our grand annual event. Multi-colored meteors, live chamber music under the stars, premium telescope access, and a seasonal dinner. Limited to 120 guests.

6 PM — 1 AM · $85

Our Instruments

The Telescope Fleet

Three primary instruments — each a window into a different layer of the cosmos. All maintained to research-grade precision.

Historic observatory dome with telescope

Primary · Since 1952

The Clark Refractor

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

Deep space nebula captured through research telescope

Research · Since 2003

The Harland Reflector

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 telescope observing the sun

Solar · Since 2019

The Daystar Scope

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

Plan Your Visit

Under the Open Sky

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.

Reserve Your Evening

Book a standard visit or an event night. We'll confirm by email within 24 hours.

Support the Stars

Become a Steward of
the Night Sky

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

  • Free admission
  • Priority event booking
  • Sky calendar
Popular

$120

Annual · Family

  • All Individual benefits
  • Covers 2 adults + children
  • Members-only nights
  • 10% gift shop discount

$500

Patron

  • All Family benefits
  • Private telescope session
  • Name on donor wall
  • Annual director's dinner
Join or Renew Today
Person looking through a telescope under the Milky Way

"The sky is the ultimate shared heritage."

— Dr. Elise Marchetti, Resident Astronomer