[commercial - Windows] A tool for recording observations and planning future observing sessions. Allows tracking of progress on common amateur observing programs (Messier, Herschel...
http://www.astronotes.com/
[open source - multiplatform] Development and integration of tools and numerical algorithms into the Python scripting language.
http://www.astro.washington.edu/owen/AstroPy.html
C88 provides detailed information about the celestial sphere objects, visible with naked eyes and for the use of an eyepiece of a modest amateur telescope to observe deep sky obje...
http://www.alcyone.de/c88/english/index.htm
Windows program which creates sundials and calendars, see the dates and names of the year's moons, and calculate Easter.
http://www.blibbleblobble.co.uk/Downloads/Calendar/
[shareware - Win95/98/NT] Deepsky 99 solves an important need for amateur and professional observers. The software allows the user to plan a productive observing session and recor...
http://www.deepsky2000.com/
Excel spreadsheet calculates temporal variation in astronomic constants, obliquity of the ecliptic, and illumination angles at any specified latitude. You need only input a date or...
http://www.jqjacobs.net/astro/epoch_2000.html
[commercial & freeware - multiplatform] Interactive Java applets display the position, daily and annual path of the sun and the moon, for any time and location.
http://www.jgiesen.de/GeoAstro/GeoAstro.htm
[commercial - multiplatform] This CD contains three Jet Propulsion Laboratory Planetary and Lunar Ephemerides along with a toolbox of FORTRAN subroutines that allow the user to obt...
http://www.willbell.com/software/jpl.htm
[commercial, demo available - Win95/98/NT] A comprehensive tool for displaying a variety of information on the Moon and aspects of its behaviour.
http://indigo.ie/~gnugent/LunarPhase
[Windows] A desktop application that displays the times of the various phases of the moon and a picture of the current phase of the moon.
http://www.fourmilab.ch/moontoolw/
[shareware - MacOS] Real-time graphical representation of the lunar visual aspect for any time/date/location. Elongation, PA bright limb, RA, DEC, percent illuminated, alt/az, heli...
http://balder.prohosting.com/stouch/MOONCLOCK.html
[commercial - DOS, Macintosh] A software system that provides high-precision astronomical data in tabular form for a wide variety of objects; it calculates much of the information ...
http://www.willbell.com/almanacs/almanac_mica.htm
[commercial, demo available - Win95/98/NT] Astronomical Observation Suite - Astronomical observation and logging software.
http://www.rainman-soft.com/
[open source - multiplatform] A module for performing astronomical computations using the Python scripting language.
http://www.rhodesmill.org/pyephem/
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