Theodor Jacobsen Observatory Seattle: Visiting Hours, Tickets, and Complete Visitor Guide

Date: 03/07/2025

Introduction

Located at the heart of the University of Washington (UW) campus in Seattle, the Theodor Jacobsen Observatory (TJO) stands as a testament to the region’s rich scientific and educational heritage. As one of the oldest observatories in the Pacific Northwest, TJO invites visitors to journey through time, explore historic astronomical instruments, and experience the night sky from within the city. Whether you are an astronomy enthusiast, a history buff, or a curious traveler, the observatory offers a unique blend of scientific discovery and Seattle’s architectural legacy.

For the latest visiting hours, ticketing information, and special events, always consult the UW Astronomy Department website, and explore further background via UW Magazine and the Seattle Astronomical Society.

Table of Contents

Historical and Scientific Significance

Origins and Early Development

Established in 1895, the Theodor Jacobsen Observatory is among the oldest astronomical observatories in the Pacific Northwest and the second-oldest building on the UW Seattle campus. Its foundation marked a pivotal moment for scientific education in the region, symbolizing UW’s commitment to expanding research and public outreach in astronomy. The observatory was originally designed to support the university’s growing astronomy program, hosting both educational activities and timepiece calibration before modern timekeeping was widespread (SAH Archipedia; Seattle Met).

Academic Legacy

Named for Theodor S. Jacobsen, a distinguished UW astronomer and geophysicist, the observatory reflects a tradition of excellence in astronomical research and public education. While its main research function waned in the mid-20th century, TJO remains a vital educational hub, hosting public night sky viewings, lectures, and outreach programs (UW News).


Architectural Design and Features

Building Origins and Construction

Designed by Charles Willard Saunders, the architect behind UW’s iconic Denny Hall, TJO was constructed using leftover Tenino sandstone from the Denny Hall project. The building’s robust, L-shaped stone structure, round tower, and hand-cranked steel dome exemplify late 19th-century scientific architecture (UW Magazine).

Dome and Telescope Housing

The observatory’s manually rotatable dome—ingeniously supported by Civil War cannonballs—houses its centerpiece: a six-inch Warner & Swasey refracting telescope. This dome design, unique among 19th-century observatories, allowed seamless alignment with celestial objects (Astronomy Blog).

Interior Layout

  • Dome Room: Houses the historic telescope.
  • Classroom: Seats up to 55 people, used for lectures and educational programs.
  • Antique Display Room: Features lighted cabinets with vintage astronomical instruments and memorabilia.
  • Facilities: Two small bathrooms.

Access to the dome is via a steep, narrow staircase typical of the era, which may limit accessibility for some visitors (UW Magazine).


The Historic Telescope

The observatory’s six-inch Warner & Swasey refracting telescope, crafted in 1892, is a rare, fully functional example of late 19th-century astronomical technology. Originally used for research and timekeeping, this brass instrument provides exceptional clarity for viewing the Moon, planets, and bright deep-sky objects. The telescope is mounted on a Warner & Swasey equatorial mount, enabling precise tracking across the night sky (UW Magazine).


Visiting Hours and Tickets

Public Visiting Hours

  • Season: Open to the public from April through September.
  • Open Nights: Typically held on the first and third Tuesday or Wednesday of each month (confirm current schedule on the UW observatory website).
  • Time: Evenings from 8:00 PM to 10:00 PM.

Admission and Reservations


Accessibility and Directions

  • Accessibility: The classroom is accessible via a modern ADA-compliant ramp, but the historic dome and telescope are accessible only by stairs and are not wheelchair-accessible. Contact the UW Astronomy Department in advance to discuss accommodations.
  • Parking: Limited visitor parking is available in UW lots and nearby streets. Using public transit or rideshare is recommended, with the UW light rail station within walking distance (UW Campus Map).
  • Restrooms: Available in adjacent campus buildings.

Visitor Experience: Tours, Events, and Tips

What to Expect

  • Guided Talks: Each open night features an accessible lecture by UW faculty or students, covering the basics of stargazing, telescope operation, and current astronomical discoveries (State of WA Tourism).
  • Telescope Viewing: View the Moon, planets, and star clusters through the main refractor, guided by Seattle Astronomical Society volunteers (Cruise America).
  • Historic Tour: Explore vintage brass astronomical equipment and the observatory’s unique architectural features (Seattle Met).

Practical Tips

  • Weather: Viewing is weather-dependent. Check forecasts and event updates before attending.
  • Dress: Evenings can be chilly—bring layers.
  • Essentials: Consider bringing a blanket, snacks, water, and a red-light flashlight.
  • Arrival: Arrive early to secure a spot, especially for special astronomical events.
  • Photography: Astrophotography is possible outside, though limited by light pollution. Bring binoculars or small telescopes if desired (ICO Optics).

Community Engagement and Educational Programs

TJO is a hub for public engagement, offering:

  • K-12 School Visits: Hands-on astronomy workshops and field trips.
  • Seattle Astronomical Society Star Parties: Monthly gatherings at the observatory and other city locations (Seattle Astronomical Society).
  • Public Lectures and Workshops: Covering topics from telescope basics to the latest discoveries in astrophysics.
  • Collaborations: Partnerships with local museums and science organizations for special events (Pacific Science Center Events).

Nearby Attractions and Additional Resources

  • On Campus: Visit Denny Hall, Drumheller Fountain, and the Burke Museum of Natural History and Culture.
  • University District: Explore cafes, shops, and additional cultural sites.
  • Further Stargazing: For darker skies, consider visiting places like Mount Rainier or the Olympic Peninsula (State of WA Tourism).

Frequently Asked Questions (FAQ)

Q: What are the observatory’s visiting hours?
A: Public open nights are typically held on the first and third Tuesday or Wednesday evenings from April through September, 8:00 PM–10:00 PM. Confirm the current schedule on the UW observatory website or the UW Events Calendar.

Q: Is admission free?
A: Yes, admission is free. Reservations are required to look through the main telescope.

Q: Are children and families welcome?
A: Absolutely. Programs are family-friendly and suitable for all ages.

Q: Is the building wheelchair accessible?
A: The classroom is accessible, but the dome and telescope are not due to the historic stairs.

Q: Can I bring my own telescope or binoculars?
A: Yes, for outdoor use.

Q: Where do I park?
A: Limited parking is available in UW lots and on nearby streets. Public transit is encouraged.

Q: How do I make a reservation?
A: Reserve through the UW observatory website or the Seattle Astronomical Society calendar.


Plan Your Visit

Make the most of your visit by:

  • Checking the latest schedule and making necessary reservations online.
  • Preparing for Seattle’s variable weather.
  • Exploring nearby attractions before or after your observatory visit.
  • Downloading the Audiala app for interactive audio tours and sky guides.

Be sure to follow the Seattle Astronomical Society and UW Astronomy Department on social media for updates, event announcements, and educational content.


References


The Theodor Jacobsen Observatory stands as a living bridge between Seattle’s scientific past and present, offering unforgettable experiences for visitors of all ages. Whether you seek the thrill of peering through a historic telescope, the charm of 19th-century architecture, or the inspiration of community-driven science, TJO welcomes you to discover the cosmos in the heart of Seattle.

Visit The Most Interesting Places In Seattle

1000 Second Avenue
1000 Second Avenue
1120 Denny Way
1120 Denny Way
1201 Third Avenue
1201 Third Avenue
1600 Seventh Avenue
1600 Seventh Avenue
5Th Avenue Theatre
5Th Avenue Theatre
7Th & Jackson
7Th & Jackson
970 Denny Way
970 Denny Way
Adjacent, Against, Upon
Adjacent, Against, Upon
Alaskan Way Viaduct
Alaskan Way Viaduct
Amazon Spheres
Amazon Spheres
Amazon Tower I
Amazon Tower I
|
  Andy'S Diner
| Andy'S Diner
|
  Angie'S Umbrella
| Angie'S Umbrella
Annapurna Cafe
Annapurna Cafe
Antioch University Seattle
Antioch University Seattle
Arthur Foss
Arthur Foss
Artusi
Artusi
Benaroya Hall
Benaroya Hall
Benson Hall
Benson Hall
Birthplace Of Seattle Monument
Birthplace Of Seattle Monument
Boeing Plant 2
Boeing Plant 2
Broken Obelisk
Broken Obelisk
Burke Museum Of Natural History And Culture
Burke Museum Of Natural History And Culture
Cal Anderson Park
Cal Anderson Park
Camlin Hotel
Camlin Hotel
Capitol Hill Branch Library
Capitol Hill Branch Library
Capitol Hill Mystery Soda Machine
Capitol Hill Mystery Soda Machine
Carl S. English, Jr., Botanical Gardens
Carl S. English, Jr., Botanical Gardens
|
  Cc'S
| Cc'S
Central Saloon
Central Saloon
Chief Of The Suquamish – Chief Seattle
Chief Of The Suquamish – Chief Seattle
Chief Seattle
Chief Seattle
Chris Cornell Memorial Statue
Chris Cornell Memorial Statue
Cirrus
Cirrus
City University Of Seattle
City University Of Seattle
Climate Pledge Arena
Climate Pledge Arena
Coast Guard Museum Northwest
Coast Guard Museum Northwest
Colman Dock
Colman Dock
Columbia Center
Columbia Center
Condon Hall
Condon Hall
Conibear Shellhouse
Conibear Shellhouse
Copacabana Restaurant
Copacabana Restaurant
Cuff Complex
Cuff Complex
Daybreak Star Cultural Center
Daybreak Star Cultural Center
Denny Hall
Denny Hall
Discovery Park
Discovery Park
Docusign Tower
Docusign Tower
Double Header
Double Header
Dr. Mark A. Matthews
Dr. Mark A. Matthews
Drumheller Fountain
Drumheller Fountain
Duwamish
Duwamish
Eagle
Eagle
Egyptian Theater
Egyptian Theater
Fairmont Olympic Hotel
Fairmont Olympic Hotel
Fallen Firefighters Memorial
Fallen Firefighters Memorial
|
  Fat'S Chicken And Waffles
| Fat'S Chicken And Waffles
Federal Reserve Bank Building
Federal Reserve Bank Building
First Methodist Protestant Church Of Seattle
First Methodist Protestant Church Of Seattle
Freeway Park
Freeway Park
Frye Art Museum
Frye Art Museum
Gas Works Park
Gas Works Park
George Washington Memorial Bridge
George Washington Memorial Bridge
Grand Army Of The Republic Cemetery
Grand Army Of The Republic Cemetery
Gum Wall
Gum Wall
Harbor Island
Harbor Island
Harvard Exit Theatre
Harvard Exit Theatre
Hec Edmundson Pavilion
Hec Edmundson Pavilion
Henry Art Gallery
Henry Art Gallery
Henry M. Jackson
Henry M. Jackson
Henry M. Jackson Federal Building
Henry M. Jackson Federal Building
Hiram M. Chittenden Locks
Hiram M. Chittenden Locks
Historic Chinatown Gate (Seattle)
Historic Chinatown Gate (Seattle)
Holy Names Academy
Holy Names Academy
Honeyhole Sandwiches
Honeyhole Sandwiches
Howe Street Stairs
Howe Street Stairs
Husky Stadium
Husky Stadium
International District / Chinatown
International District / Chinatown
Interurban Building
Interurban Building
Iron Horse
Iron Horse
|
  Jack'S Fish Spot
| Jack'S Fish Spot
Kenyon Hall
Kenyon Hall
King County Courthouse
King County Courthouse
Kobe Bell
Kobe Bell
Lady Rainier
Lady Rainier
Lake View Cemetery
Lake View Cemetery
Lake Washington Ship Canal
Lake Washington Ship Canal
|
  Living Computers: Museum + Labs
| Living Computers: Museum + Labs
Lotus (Motor Vessel)
Lotus (Motor Vessel)
Louisa Boren Park
Louisa Boren Park
Lumen Field
Lumen Field
Made In Usa
Made In Usa
Magnuson Park
Magnuson Park
Maíz
Maíz
Maneki
Maneki
Market Theatre
Market Theatre
Marmite
Marmite
Maynard Building
Maynard Building
Mccaw Hall
Mccaw Hall
Mcgraw Square
Mcgraw Square
Mckenzie (Seattle Apartment Building)
Mckenzie (Seattle Apartment Building)
Memorial Stadium
Memorial Stadium
|
  Merchant'S Cafe
| Merchant'S Cafe
Momiji
Momiji
Moore Theatre
Moore Theatre
Museum Of History & Industry
Museum Of History & Industry
Museum Of Pop Culture
Museum Of Pop Culture
Mutual Life Building
Mutual Life Building
Myrtle Edwards Park
Myrtle Edwards Park
National Nordic Museum
National Nordic Museum
Neukom Vivarium
Neukom Vivarium
Northwest African American Museum
Northwest African American Museum
Northwest Seaport
Northwest Seaport
Occidental Park
Occidental Park
Odegaard Undergraduate Library
Odegaard Undergraduate Library
Off The Rez
Off The Rez
Ok Hotel
Ok Hotel
Olympic Sculpture Park
Olympic Sculpture Park
Pacific Place
Pacific Place
Pacific Science Center
Pacific Science Center
Padelford Hall
Padelford Hall
Paramount Theatre
Paramount Theatre
Pike Place Market
Pike Place Market
Pike Street Hill Climb
Pike Street Hill Climb
Pioneer Square
Pioneer Square
Pioneer Square Pergola
Pioneer Square Pergola
Pioneer Square Totem Pole
Pioneer Square Totem Pole
Playhouse Theatre
Playhouse Theatre
Pony
Pony
Port Of Seattle
Port Of Seattle
Prefontaine Fountain
Prefontaine Fountain
Queen Anne Columbarium
Queen Anne Columbarium
Rainier Tower
Rainier Tower
Red Square
Red Square
Roy Vue
Roy Vue
Russell Investments Center
Russell Investments Center
Safeco Plaza
Safeco Plaza
Seattle Art Museum
Seattle Art Museum
Seattle Asian Art Museum
Seattle Asian Art Museum
Seattle Center
Seattle Center
Seattle Central Library
Seattle Central Library
|
  Seattle Children'S
| Seattle Children'S
|
  Seattle Children'S Museum
| Seattle Children'S Museum
Seattle Cinerama
Seattle Cinerama
Seattle Convention Center
Seattle Convention Center
|
  Seattle Fishermen'S Memorial
| Seattle Fishermen'S Memorial
Seattle Opera
Seattle Opera
Seattle Pacific University
Seattle Pacific University
Seattle Public Library
Seattle Public Library
Seattle Repertory Theatre
Seattle Repertory Theatre
Seattle University
Seattle University
Seattle Yacht Club
Seattle Yacht Club
|
  Sick'S Stadium
| Sick'S Stadium
Smith Tower
Smith Tower
|
  St. Mark'S Episcopal Cathedral
| St. Mark'S Episcopal Cathedral
Starbucks Reserve Roastery
Starbucks Reserve Roastery
State Route 99 Tunnel
State Route 99 Tunnel
Statue Of Leif Erikson
Statue Of Leif Erikson
Statue Of Liberty
Statue Of Liberty
Suzzallo Library
Suzzallo Library
Swedish Medical Center
Swedish Medical Center
Swiftsure
Swiftsure
Sylvan Grove Theater And Columns
Sylvan Grove Theater And Columns
T-Mobile Park
T-Mobile Park
Taipei Economic And Cultural Office In Seattle
Taipei Economic And Cultural Office In Seattle
Taku
Taku
The Crocodile
The Crocodile
The Electric Lady Studio Guitar
The Electric Lady Studio Guitar
The London Plane
The London Plane
The Mitt
The Mitt
The Penthouse
The Penthouse
|
  The People'S Wall
| The People'S Wall
The Triple Door
The Triple Door
The Wildrose
The Wildrose
Theodor Jacobsen Observatory
Theodor Jacobsen Observatory
Times Square Building
Times Square Building
Town Hall Seattle
Town Hall Seattle
Unicorn
Unicorn
Union Square
Union Square
Union Station
Union Station
United Confederate Veterans Memorial
United Confederate Veterans Memorial
United States Courthouse
United States Courthouse
University Of Washington
University Of Washington
University Of Washington Clean Energy Institute
University Of Washington Clean Energy Institute
University Of Washington Libraries
University Of Washington Libraries
University Of Washington Medical Center
University Of Washington Medical Center
University Of Washington Quad
University Of Washington Quad
University Unitarian Church
University Unitarian Church
Urban Garden
Urban Garden
U.S. Bank Center
U.S. Bank Center
Uw Tower
Uw Tower
Virginia V
Virginia V
Volunteer Park
Volunteer Park
Volunteer Park Conservatory
Volunteer Park Conservatory
Warren G. Magnuson Health Sciences Building
Warren G. Magnuson Health Sciences Building
Waterfall Garden Park
Waterfall Garden Park
Waterfront Park
Waterfront Park
Westin Building
Westin Building
Westlake Center
Westlake Center
Westlake Park
Westlake Park
William H. Gates Hall
William H. Gates Hall
Wind Cradle
Wind Cradle
Wing Luke Museum Of The Asian Pacific American Experience
Wing Luke Museum Of The Asian Pacific American Experience
Woodland Park Zoo
Woodland Park Zoo
Zeitgeist Coffee
Zeitgeist Coffee
Zig Zag Café
Zig Zag Café