Database

Messier Catalog
SIMBAD Astronomical Database
Digital Sky Survey

Astrophotography

Brian Lula CCD Imaging
Matt BenDaniel
Catching the Light

Software

Registax
CCD Calculator
Astro Logsheets

Astro Weather

Weatherunderground.com
Spaceweather.com
Solar Data

Observing

Sky Chart
Astronomy Daily
Sky and Telescope
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