- Astronomical League
The parent organization of many astronomy clubs in America. The
site includes details of the Leagues observing programs, such as; The
Messier Club, The Herschel 400 Club, etc.
- International Dark Sky
Information on lighting ordinances and legislation/efforts to reduce
light pollution at astronomical observing sites.
- Southern Cross
Founded in 1922 in Miami, Forida, the SCAS hosts the now famous "Winter
Star Party." Site includes information about the star party.