AAVSO: American Association of Variable Star Observers
The American Association of Variable Star Observers: Professional and Amateur collection, research, and analyzation of variable star observations.
www.aavso.org/   reviews

Information Bulletin on Variable Stars.
www.konkoly.hu/IBVS/IBVS.html   reviews

ASSA: Variable Star Group
Watch a variable for a change!
www.assa.org.au/sig/variables/   reviews

GCVS Research Group: Homepage.
Sternberg Astronomical Institute Moscow, Russia GCVS Research Group Catalogues of Variable Stars What's new Recent publications Send questions and comments to Olga Durlevich visitors from 16 November 2001. Russian Foundation for Basic Research ...
www.sai.msu.su/groups/cluster/gcvs/   reviews

A Ritzian Interpretation of Variable Stars
Fundamental research into the nature of the speed of light in space using observations of variable stars as evidence ...
www.ebicom.net/~rsf1/binaries.htm   reviews

Astronomy On-Line: Variable Stars
Variable Stars In the footsteps of John Goodricke The sky is full of variable stars and many of them are regularly observed by professional and amateur astronomers. This project will give you the chance to contribute actively to such observations, by making your own brightness estimates of one or more selected objects! This Astronomy On-Line Collaborative Project has been set up with the kind ...
www.eso.org/outreach/spec-prog/aol/market/collaboration/varstar/   reviews