Cartes du Ciel is free software released under the terms of the
GNU General Public License
For use with Linux, Windows, Mac OS X
This program enables you to draw sky charts, making use of the data in many catalogs of stars and nebulae. In addition the position of planets, asteroids and comets are shown.
The purpose of this program is to prepare different sky maps for a particular observation. A large number of parameters help you to choose specifically or automatically which catalogs to use, the colour and the dimension of stars and nebulae, the representation of planets, the display of labels and coordinate grids, the superposition of pictures, the condition of visibility and more. All these features make this celestial atlas more complete than a conventional planetarium.
The software itself is released under the GPL license.
The different catalog data are generally public domain but an acknowledgment to the original catalog author is require if you use this data for your research.
You are free to use any chart or print produced by the program for any use, commercial or not (blog, web publication, printed book,…). You can mention Skychart and link to this page, but this is not required.
You can help the project in different way, no need to be a programmer.
Cartes du Ciel Version 3 use Lazarus/FreePascal compiler and the following component :
The Libsql component to access the SQLite and MySQL database.
Synapse TCP/IP library, by Lukas Gebauer http://www.ararat.cz/synapse/
EnhEdits by Paul Warren http://users.uniserve.com/~hg_soft .
XML Parser http://destructor.de/xmlparser .
If a JPL ephemeris file DExxx cannot be found, the planets calculation between -3000 and +3000 is based on plan404 by Steve Moshier.