PP3 is
free software
Free software or libre software is computer software distributed under terms that allow users to run the software for any purpose as well as to study, change, and distribute it and any adapted versions. Free software is a matter of liberty, no ...
that produces
sky charts, focussing on high quality graphics and typography. It is distributed a license based on the
MIT License
The MIT License is a permissive free software license originating at the Massachusetts Institute of Technology (MIT) in the late 1980s. As a permissive license, it puts only very limited restriction on reuse and has, therefore, high license comp ...
, but with this restriction added:
Sky charts are produced as
LaTeX
Latex is an emulsion (stable dispersion) of polymer microparticles in water. Latexes are found in nature, but synthetic latexes are common as well.
In nature, latex is found as a milky fluid found in 10% of all flowering plants (angiosperms ...
files, so an installation of LaTeX and
Ghostscript
Ghostscript is a suite of software based on an interpreter for Adobe Systems' PostScript and Portable Document Format (PDF) page description languages. Its main purposes are the rasterization or rendering of such page description language file ...
is required to obtain results in
PostScript or
PDF formats. Knowledge of command line syntax for these packages is however not required, as PP3 can run the conversions automatically.
Initially
Wikipedia
Wikipedia is a multilingual free online encyclopedia written and maintained by a community of volunteers, known as Wikipedians, through open collaboration and using a wiki-based editing system. Wikipedia is the largest and most-read refer ...
's own star charts were produced by PP3. PP3 generates maps in the
azimuthal equidistant projection
The azimuthal equidistant projection is an azimuthal map projection. It has the useful properties that all points on the map are at proportionally correct distances from the center point, and that all points on the map are at the correct azimut ...
.
''footnote 5:'' "the equidistant azimuthal projection"
/ref>
See also
*Space flight simulation game
A space flight simulation is a genre of flight simulator video games that lets players experience space flight to varying degrees of realism. Common mechanics include space exploration, space trade and space combat.
Overview
Some games in the ...
**List of space flight simulation games
This is a sourced index of commercial, indie and freeware space flight simulation games. The list is categorized into four sections: space flight simulators, space flight simulators with an added element of combat, space combat simulators with a ...
*Planetarium software
Planetarium software is application software that allows a user to simulate the celestial sphere at any time of day, especially at night, on a computer. Such applications can be as rudimentary as displaying a star chart or sky map for a specific t ...
* List of observatory software
References
External links
Official website
*
Free astronomy software
Science software for Windows
Free software programmed in C++
{{Astronomy-stub