Interactive Java applets (JARS Top Rated!) display the position of the sun and the moon on the horizon for any date, time and location, and on a world map with day and night regions. The times of rise and setting, the declination, the Greenwich hour angle and the equation of time are computed ...
www.jgiesen.de/GeoAstro/GeoAstro.htm
Advanced Auroral Activity and Space Weather Monitoring Software *NEW* Software: SWIM - The World's Most Advanced Space Weather Software System Monitor your local weather (cloud) conditions and solar activity as well ! All in real-time ! *NEW*: Read the Sky & Telescope Magazine Review of the old Version 2.0 STD Aurora Monitor Software Download the Trial Version Now Available on CD-ROM ORDER FORM ...
Freeware for Psion handhelds to help you find and track objects of the night sky. Well suited to Dobsonians.
Moontool for Windows ...
www.fourmilab.ch/moontoolw
Willmann-Bell, Inc. publishers and booksellers serving the Astronomy Community since 1973.
www.willbell.com/software/jpl.htm
There is a sky. There are things in the sky. This program draws maps of things in the sky.
starchart.sourceforge.net
SkySight UPDATE! 11 April 2001 You've waited... you've pondered... you've wondered: when will SkySight be released Wait no longer SkySight is here! After more than a year since our original announcement, Southern Stars Systems is releasing the current version of SkySight as a free public beta. We haven't yet implemented all of the features we'd have liked, and there are still a few kinks that ...
southernstars.com/skysight/index.html
Download an Excel spreadsheet to calculate temporal variation in astronomic "constants, " obliquity of the ecliptic and illumination angles at specified latitudes.
www.jqjacobs.net/astro/epoch_2000.html
Willmann-Bell, Inc. publishers and booksellers serving the Astronomy Community since 1973.
www.willbell.com/almanacs/almanac_mica.htm
balder.prohosting.com/stouch/MOONCLOCK.html