This set of files has been prepared by Jan Hollan, working at the Nicholas Copernicus Observatory and Planetarium in Brno, also a member of an Ecological Institute Veronica.
The present author's activities are concentrated
on the prevention of the light pollution, see
www.astro.cz/darksky or (in Czech)
svetlo.astro.cz for a guide.
There are mainly four kinds of files there: