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Epoch_2000 Temporal Epoch Calculator (Popularity:  )
http://www.jqjacobs.net/astro/epoch_2000.html
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 the latitude.
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Automated Variable Star Observing (Popularity: )
http://astro.corlan.net/avsomat
[freeware - Linux] Command-line program to automate reduction of variable star CCD images.
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SkySight (Popularity: )
http://www.southernstars.com/skysight/index.html
[commercial, Win/Mac] CCD camera control and image processing, includes SkyChart III.
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Starchart - Star mapping software (Popularity: )
http://starchart.sourceforge.net/
[opensource - POSIX] There is a sky. There are things in the sky. This program draws maps of things in the sky.
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JPL Planetary and Lunar Ephemerides (Popularity: )
http://www.willbell.com/software/jpl.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 obtain the coordinates of ...
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PyEphem (Popularity: )
http://www.rhodesmill.org/pyephem/
[open source - multiplatform] A module for performing astronomical computations using the Python scripting language.
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Astronomical clock MAXCLOCK (Popularity: )
http://www.umark.de/maxclock_main_e.html
Astronomical high-precision software clock for personal computers, displays various sidereal and solar times, position of Sun and Moon, and other time-related items.
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Multiyear Interactive Computer Almanac (Popularity: )
http://www.willbell.com/almanacs/almanac_mica.htm
[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 tabulated in the ...
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STD Aurora Monitor Software (Popularity: )
http://solar.spacew.com/aurora/
[commercial - Win95/98/NT/2000] Advanced auroral activity monitoring software.
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NGCView (Popularity: )
http://www.rainman-soft.com/
[commercial, demo available - Win95/98/NT] Astronomical Observation Suite - Astronomical observation and logging software.
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GeoAstro Applet Collection (Popularity: )
http://www.jgiesen.de/GeoAstro/GeoAstro.htm
[commercial & freeware - multiplatform] Interactive Java applets display the position, daily and annual path of the sun and the moon, for any time and location.
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Moon Tool (Popularity: )
http://www.fourmilab.ch/moontoolw/
[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.
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Deepsky 99 - Software for Observers (Popularity: )
http://www.deepsky2000.com/
[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 record what was observed ...
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StarTrak (Popularity: )
http://www.startrak.co.uk/
Freeware for handheld computers to help find and track objects of the night sky.
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LunarPhase (Popularity: )
http://indigo.ie/~gnugent/LunarPhase
[commercial, demo available - Win95/98/NT] A comprehensive tool for displaying a variety of information on the Moon and aspects of its behaviour.
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The Sun API (Popularity: )
http://www.sunlitdesign.com/products/thesunapi
[commercial & freeware - Windows] A library of functions for calculating key solar parameters for solar design including sundials.
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Moonclock (Popularity: )
http://balder.prohosting.com/stouch/MOONCLOCK.html
[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, heliocentric lat/long, distance, and radius.
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