Chasing Venus Lecture Series: Solution of the Black-drop Mystery

Fourth in the Chasing Venus lecture series, "Transits of Venus and Mercury: Solution of the Black-drop Mystery", given by Jay M. Pasachoff, Director of Hopkins Observatory and Field Memorial Professor of Astronomy, Williams College on May 20, 2004

Chapter 1 - Introduction, Ron Brashear, Chasing Venus Curator 0:01
Chapter 2 - History of the Transit to the Solar System 04:20 
Chapter 3 - History of Observed Transits Explorations 17:38
Chapter 4 - Methods Used in Measuring the Transit 31:20
Chapter 5 - Question & Answer 43:40