Light Pollution Groups
- International Dark Sky Association – www.darksky.org
- Belgium – www.lichthinder.be
- Czech Republic – www.astro.cz/darksky/
- France – www.astrosurf.com/anpcn/
- Germany – www.lichtverschmutzung.de
- Hungary – fenyszennyezes.csillagaszat.hu
- Italy – debora.pd.astro.it/cinzano/
- Malta – www.maltastro.org
- Nederlands – www.platformlichthinder.nl
- Slovenia – www.fiz.uni-lj.si/astro/comets/DSSi/
- Switzerland – www.darksky.ch
- UK – BAA Comission for Dark Skies