The AAVSO Variable Star Index (VSX) is a large database (repository) with up-to-date information about a very large number of variable stars. It includes a/o the coordinates of each variable star, its variability type, magnitude range, etc. 


If a Light Curve window contains an AAVSO light curve, the Light Curve Info box will display a subset of the VSX information for the represented variable star: the coordinates (R.A. and Dec.), variability type (Var. type) and the brightness range (Mag range). If you have no active Internet connection, this information is not shown