American Association of Variable Star Observers (AAVSO) Return to Directory American Association of Variable Star Observers (AAVSO) Category Special Interest Address 49 Bay State Road Cambridge Massachusetts 02138 USA http://www.aavso.org/ (617) 354-0484 Contact Name Kathy Spirer Number of Members ~5,000 Directions to listing From: Current location Specific Address Travel Mode: Driving Public Transit Walking Cycling