Skip to main content


Photos of Ted Wales


Click any image to enlarge.

Margaret W. Mayall


A Margaret Mayall Centenary Celebration!

The AAVSO and International Cooperation

Watch this page grow as more information is added.

The AAVSOs "Old Guard"


From the beginning, the number of observations being sent to the AAVSO each year began to rise dramatically: from 4,900 in 1911; to 11,600 in 1912; 16,800 in 1914; 17,400 in 1917; 19,300 in 1921; and 26,900 in 1924.


AAVSO 49 Bay State Rd. Cambridge, MA 02138 617-354-0484