An open source desktop planetarium which tracks 120,000 stars, the planets, sun and moon, 130 deep space objects and a user-defined catalog of comets, asteroids and dwarf planets.
Displays the stars, constellations, deep sky objects, Sun, Moon, and planets as visible from any location on Earth at any given time, with optional animation. [shareware - Win98/2000/XP/Vista]
From the U.S. Naval Observatory. Online forms provide sunrise, sunset, moonrise, moonset, and twilight times for one day or one year; moon phases, eclipse charts, and data for major solar system bodies and bright stars.
A free online planetarium JAVA-applet for producing detailed finder charts for 10,000s of deep-sky objects. Stars to magnitude 11.5 and deep-sky objects to magnitude 16.5 may be viewed and printed.