A 501(c)(3) tax exempt social and education organization

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Observing

• What's Up in the Night Sky — from Robert Ferguson Observatory
  
  
• Heavens Above exact timings for passes of the ISS, satellites, minor planets, comets, etc.
  
  
• Spaceweather for Solar activity
  
  
• Aurora Sentry
  
  
• Astronomy Picture of the Day You can view APOD directly on many mobile devices
  
  
• Night Sky Network Find astronomy clubs in the US to plan vacation observing

 

Member Web Sites

• Keith Payea - Scroll down to the Amateur Science section

• Burt Katzung

Getting Started in Astronomy

Also see our article on this subject.

• Choosing a Telescope for Astronomy

• Andy's Shot Glass (Great site, lots of video articles)
  
  
• Be an Astronomer Right From Your Window
  
  
• Beginner Articles at "Cloudy Nights Telescope Review" Site

Space-Based Astronomy

• Extreme Ultraviolet Explorer Satellite

• Gamma-ray Large Area Space Telescope (GLAST)

• Hubble Heritage Project

• Swift - Video on how Swift's mission and operation

• XMM-Newton  

General Science and Science Entertainment

• Timothy Ferris Learn more about his books, films, interviews, and great science links. 
  
  
• National Geographic Society
  
  
• PBS NOVA
  
  
• Seeing in the Dark (PBS)
  
  
• Society of Amateur Scientists

Magazines

• Astronomy

• Astronomy Now (United Kingdom)

• Sky and Telescope

• Star Date

• Night Sky Observer

• SkyNews

Optics and Raytracing

• The Optics Project

• Software for Optical Design and Analysis from Telescopes.ru

Spectroscopy

• UV and Visual Absorption Spectroscopy

Used Equipment

• Astromart

Equipment Reviews

• Astromart Review

• Cloudy Nights Telescope Reviews

• Ed Ting's Scope Reviews

DIY Telescope Making, Dark Sky preservation

• International Dark-Sky Assn. Find out about intelligent lighting
  
  
• SCAS member Tom Burrows (now residing in Colorado) provides some great advice on home lighting that reduces light pollution.
  
  
• Roger Ceragioli's Refractor Construction Page
  
  
• Ronchi Testing by MM Research

Groups

• Orion Telescopes

Vendors

• Anacortes

• Antares

• Apogee

• Astro-Physics

• BES Optics Inc.

• Celestron

• Coronado

• Denkmeier Binoviewers

• Discount Binoculars (Their retail store is Out of this World in Mendocino, on Main Street)

• Hands On Optics

• Meade

• Oceanside Photo and Telescope (OPT)

• Orion Telescopes and Binoculars

• Tele Vue Optics
  
  
• Thor Labs
  
  
• Scope Stuff Specializes in best bang-for-the buck accessories
  
  
• Stellarvue
  
  
• Surplus Shed

Web Based Astronomy Education

• AstronomyCast Hear fascinating audio programming on many astronomical topics. This is a great site!
  
  
• Electromagnetic Waves by David P. Stern and Mauricio Peredo
  
  
• Physics Demonstration Resources Online for Science Educators
  
  
• Learn Astronomy From Your Couch