Seattle Astronomical Society is a nonprofit organization dedicated to promoting all aspects of amateur astronomy for the benefit of its members and the general public.

Upcoming Events

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Star Field Complex - Phase 1 Fundraiser. Help us fund a 5 acre dark sky site for club members to use near Goldendale WA in bortle 2 skies.

Recent Announcements

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Join SAS

Join SAS!

SAS invites all to participate in popular SAS public events and to think about the benefits of becoming a member of SAS. All astronomy enthusiasts are welcome.

Sky Conditions

Clear skies are an essential ingredient for successful skywatching. Get a closer look at a clear sky chart or more general weather conditions.

  • Seattle Sunrise
  • Official at 07:35 AM
  • Civil at 07:00 AM
  • Nautical at 06:21 AM
  • Astronomical at 05:44 AM
  • Seattle Sunset
  • Official at 04:20 PM
  • Civil at 04:55 PM
  • Nautical at 05:34 PM
  • Astronomical at 06:11 PM
  • Lunar Phase
  • Sky Conditions
  • Seattle
  • Rattlesnake Mountain Trailhead


Recent Observing Awards

Galileo Observing Program

Welcome to the Astronomical League’s Galileo Observing Program. The purpose of this Observing Program is to experience the thrill that Galileo had when he was the first person to ...

2 awarded

Jonathan Jonathan


Awarded on Mar 02, 2023 — 9 months

Open Cluster Observing Program

Important Notice: The Open Cluster Observing Program now allows imaging as an option for completion for the award. Remote telescopes are permitted in this Observing Program. Open clusters are ...

2 awarded

Jonathan Jonathan

advanced (117)

Awarded on Feb 24, 2023 — 9 months

Planetary Nebula Observing Program

Welcome to the Astronomical League's Planetary Nebula Observing Program! Planetary Nebulae are perhaps the most interesting and beautiful objects in the heavens. A genre full of wonderful ...

3 awarded

Jonathan Jonathan

advanced (102-M)

Awarded on Dec 04, 2022 — 12 months