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Planetarium software
Stellarium
Mitaka
Orbit Explorer
Home Planet

Star Charts and Calendars
Heavens Above
Moon Phase Calculator
NASA Solar System Simulator

Research tools
MuniWin "Variable stars"
Ephemerides of Variable Stars
Finder Charts "Caltech"

Telescopes, Optics and Astrophotography
Astronomy resources
DIY "Sky and Telescope"
IRIS "Astrophotography software"
CCD image processing "Astrophotography processing"