Cartes du Ciel is free software released under the terms of the
GNU General Public License
Here it is! Maybe you are viewing this help documentation from your local computer that came with your SkyChart installation. Keep in mind that the most recent help documentation is always available online. The online documentation is written for the most recent SkyChart version.
A list of common problems and their solutions.
You can find the most up to date FAQs here.
The official Homepage of the SkyChart site.
The SkyChart group is the place where you can exchange all sorts of information regarding SkyChart.
.. by using the SkyChart Mantis bug tracker.
A local version note. All version notes can be found in SkyChart Site news page.