The Amateur Astronomers Association is proud to host its annual lecture series at the Kaufmann Theater of the American Museum of Natural History. The lectures are given on the first Friday of each month, from October through May, with occasional exceptions when that date would create a conflict. All lectures begin at 6:15 and end at 8:00 p.m. Please use the 77th Street entrance. This week’s lecture is by Alex Teachey, Columbia University, titled: "Exomoons: Kepler's Hidden Gems".