Astrolog


Astrolog

Infobox Software
name = Astrolog



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author = Walter Pullen
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released = 1991
latest release version = 5.40
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genre = Astrology
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website = http://www.astrolog.org/astrolog.htm

Astrolog is a free and open source astrology software program that has been available online since 1991. It was originally authored by Walter Pullen, and distributed via postings to the Usenet newsgroup [news:alt.astrology alt.astrology] .

Astrolog can create horoscopes, natal charts, and calculate current planetary positions in sidereal, traditional, and heliocentric formats. It can be used to relate astrological house and sign dispositors and other nonstandard systems. Astrolog uses 14 different house systems, can calculate 18 different aspects such as trines, squares, semisquares, and rarer ones such as biquintiles, quatronoviles, and sesquiquadrates. Astrolog computes the traditional planets, along with minor planetary objects such as Ceres, Juno and Vesta, and uranian objects such as Vulkanus and Russian Proserpina. It can show nearly 50 fixed stars, and animate the chart in real time synchronized with the OS clock. Astrolog can do forms of locational astrology such as astrocartography. [http://www.astrocartographyinfo.com/astrocartography_DIY.html]

Astrolog is a good example of open source software. Several different parties have contributed to the core program or to alternate versions of it. For example, Astrolog started with the early astrological formulas implemented by Michael Erlewine. Later versions of it made use of the Placalc and then Swiss Ephemeris libraries produced by Astrodienst AG. [http://astrolog.offline.ee/astrolog/changed/changed.shtml] Other parties contributed PostScript graphics, and integerated ephemeris files for minor planetary objects. Astrolog has been ported to many different platforms, where versions exist for Unix, MS-DOS, Microsoft Windows, Macintosh, and OS/2, among others. [http://cosmicledger.com/software/astrolog/] [http://www.paganlink.org/library/astrology/kastrolog.html] Astrolog is also distributed as a sample program with versions of SUSE Linux.

Most consider Astrolog to rival commercial programs in quality. In November 1995, The Mountain Astrologer reviewed a number of software programs, where Astrolog was the one freeware program included, described as "good enough to be worthy of review with the main commercial programs". In the 1990's, Astrolog was mentioned a number of times in American Astrology's "The New Astrology" article by Ken Irving, because at the time it was the only readily available program that could compute Gauquelin sectors as described by Michel Gauquelin. [http://www.planetos.info/software.html]

All versions of Astrolog include a command line interface. Most criticism of the program is due to command switches being confusing to memorize or use. Windows and Macintosh versions eventually included standard GUI. The command switch interface allows all of Astrolog's features to be accessed from shell scripts or to be invoked by other programs. There are a number of online servers that use Astrolog as a back end to generate charts for the user. [http://www.zodiacal.com/chart.htm]

External links

* [http://www.astrolog.org/astrolog.htm Astrolog website with version 5.40]


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