Curator Steven turner discusses the work and shop of Henry Fitz, America's first commercially successful telescope manufacturer.

ʺSolution of the Black-drop Mysteryʺ Jay M. Pasachoff, Director of Hopkins Observatory and Field Memorial Professor of Astronomy, Williams College.

ʺPublic Reaction to the Transit of Venus, 1882ʺ David DeVorkin, Curator of History of Astronomy, National Air and Space Museum, Smithsonian Institution, Washington, DC