Archaeoastronomy

• Aboriginal Star Knowledge
• Archaeoastronomy.com
• Center for Archaeoastronomy
• Cloudbait Observatory
• Mesoamerican Archaeoastronomy

Associations and Societies

• American Association of Variable Star Observers
• American Astronomical Society
• The Astronomical League
• The Astronomical Society of the Pacific
• The International Dark Sky Association
• The Planetary Society

Astronomy Clubs

• Battle Point Astronomical Association
• CelestialNorth
• Eastside Astronomical Society
• Everett Astronomical Society
• Rose City Astronomers
• Seattle Astronomical Society
• Spokane Astronomical Society
• Squak Mountain Telescope Gang
• Tacoma Astronomical Society
• Whatcom Association of Celestial Observers

Atmospheric Phenomenon

• Atmospheric Optics
• Space Weather

Beginning Astronomy

• Advice for Beginning Astronomers
• Beyond Our Skies
• Celestron Knowledgebase

Computer Software

• ACP Observatory Control Software
• Astronomy Software Links
• Astrostack
• Celestia
• Earth Centered Universe
• Home Planet
• ImageJ
• JupSat Pro
• LunarPhase
• LunarPhase Pro
• Newt
• Registax
• SETI@Home
• SkyAtlas Pro
• Stellarium
• SkyMap Pro
• Software Bisque

Educational

• Boeing Museum of Flight
• Caltech Astronomy
• Center for Backyard Astrophysics
• Pacific Science Center
• The Stewart Observatory Mirror Lab
• University of Washington Astronomy
• UW Colloquium

Just for Kids

• A to Z Home's Cool Home School
• Astronomy Crafts for Kids
• Astronomy for Kids
• AstroVenture
• Athena Mars Exploration Rovers
• Kids Astronomy
• NASA Kids
• NASA Mars Exploration Program
• NASA Mars Exploration Rover Mission
• SEDS
• Space Camp
• Space Kids
• Star Child
• The Science Spot Kid Zone
• The Space Place
• The Nine Planets (For Kids)

Magazines

• Astronomy
• Astronomy Now
• Photon
• Sky News
• Sky and Space
• Sky and Telescope
• Sky and Telescope Archives

Manufacturers and Retailers

• Astronomics
• Astronomy-Mall
• Digital Vision
• Aurora Astro Products
• Celestron Telescopes
• Discovery Telescopes
• Hands On Optics
• Jims Mobile
• Lumicon
• Meade Telescopes
• Newport Glass Works
• Optical Mechanics, Inc.
• Obsession Telescopes
• Orion Telescopes
• Santa Barbara Instruments Group
• Starlight Xpress
• University Optics

NASA

• NASA's Homepage
• Chandra X-ray Observatory
• Galileo Spacecraft
• Jet Propulsion Laboratory
• Mars Global Surveyor
• Mars Pathfinder
• NASA Science
• NASA Multimedia Gallery
• NASA Human Space Flight
• NASA/IPAC Extragalactic Database
• Near Earth Object Program
• Space Telescope Science Institute
• Voyager Space Craft

Observatories

• Arecibo Observatory
• Anglo-Australian Observatory
• Cerro Tololo Inter-American Observatory
• European Southern Observatory
• Gemini Observatory
• Griffith Observatory
• Goldendale Observatory
• Kitt Peak
• Lowell Observatory
• Mt. Wilson
• National Optical Astronomy Observatory
• Palomar Observatory
• Subaru Telescope
• The Very Large Array
• U.S. Naval Observatory
• University of Washington Observatory
• W.M. Keck Observatory

Satellite Predictions

• Heavens Above

Star Charts and Observing Aids

• Messier Marathons
• Messier Catalog
• StarDate Online
• Star Gazer Home Page
• TUMOL
• UT Time
• Your Sky
• Your Sky Over Seattle

Sun, Moon and Planets

• Asteroid Occultation Updates
• CCD Imaging
• In Constant Moon
• Mars Meteorites
• Lunar Prospector
• Planetary Photojournal
• Planetary Science Research
• Solar Heliospheric Observatory (SOHO)
• Solar System Simulator
• The Digitized Sky Survey
• The Nine Planets

Telescope Making

• Richard Berry
• Universal Webcam Adaptor