Weather - Observing Related

• Clear Sky Clock

• NASA 1 Kilometer Resolution Satellite Images

• National Weather Service

• The Pickering Seeing Scale

• John Bortle's Dark Sky Scale

Manufacturers

• APT Astro

• Astro-Physics

• Celestron International

• Tele Vue

• Photographic Solutions, Inc.

• Lumicon

• Williams Optics Corporation

• Fujifilm

• SBIG Santa Barbara Instrument Group

• Nikon

• RC Optical Systems

• Parallax Instruments

Online Stores

• Adorama Camera, Inc.

• Anacortes Telescope and Wild Bird

• Astromart

• Astronomics

• Astronomy-mall.com

• Hands on Optics

• Hutech Astronomical Products

• Oceanside Photo & Telescope

• Starizona

• Takahashi - Texas Nautical

Astro-Photographers

• Russell Croman

• Robert Gendler

• Jim Misti

• Mark Keitel

• Johannes Schedler

• John Gleason

• Adam Block

• Richard Bennion

• R. Jay GaBany

• Loke Tan

• Richard Crisp

• Jerry Ludriguss

• Phillip Perkins

• Lenny Shaffer

• Volker Wendel and Bernd Flach-Wilken

• Mike Sherick

Tutorials

• Fred Miranda

• Ken Rockwell

• Astrophotography Calculator

• Scanning Basics 101 - All About Digital Images

Equipment Reviews

• Cloudy Nights Telescope Reviews

Personal Pages

• Rod Mollise's Astro Land

• An SCT Site for Beginners

• NexStar Resource Guide

• Astro-Nut.com

• Scott's SCT Gadget Page

Monitor Calibration Scale

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