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AAVSO Selected to Participate in Harvard Business School Association of Boston’s Community Action Partners Program

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From our Leadership

President's letter December, 2019

Dennis Conti Honored

AAVSO observer Dennis Conti received the 2020 AAS Chambliss Amateur Achievement Award "for his outstanding observational, computational, and educational contributions to exoplanet studies."

2020 AAVSO online CHOICE courses


Pick a Star

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Recent Activity

Variable Star Observations in Database:

40,482,088 and Counting ...
Last Observation Received:

1 min 12 sec ago by SJIA - Jim Seargeant (US)

V418 GEM   Jan 29.4385   16.787CV   

Plot V418 GEM light curve


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