the-aavso-then-and-nowhttps://www.astronomy.com/science/the-aavso-then-and-now/The AAVSO then and now | Astronomy.comcategories:Science | tags:Magazinehttps://www.astronomy.com/uploads/2021/09/AAVSO-founder.jpgInStockUSD1.001.00sciencearticleASY2023-05-182011-08-2943430