Glossary of Astronomy Terms
Bortle Dark-Sky Scale
Magnetic Declination at Your Location
National Weather Service Regional Climate Data
Jim Kaler's Star Page
Visualization of the Stellar Neighborhood
SIMBAD Astronomical Database
Aladin Lite Sky Region Viewer
HyperLEDA Galaxy Database
Mitchell Charity's "What color are the stars?"
Dale E. Gary's List of G2V Stars
Axel Mellinger's Milky Way Panorama
STScI Digitized Sky Survey Imagery
New World Atlas of Artificial Sky Brightness (Falchi)
World Atlas of Artificial Night Sky Brightness (Lorenz)
Calendar Converter
Telescope Optics Calculations
Astronomical Freeware, Shareware, and Commercial Software
Urania's Mirror