AS15-85-11437 (31 July 1971) --- Astronaut David R. Scott, commander, with tongs and gnomon in hand, studies a boulder on the slope of Hadley Delta during the Apollo 15 lunar landing mission's first extravehicular activity (EVA). The Lunar Roving Vehicle (LRV), "Rover", is in the right foreground. The view is looking slightly south of west. "Bennett Hill" is at extreme right. Astronaut James B. Irwin, lunar module pilot, took this photograph. While astronauts Scott and Irwin descended together in the Lunar Module (LM) "Falcon" to explore the Hadley-Apennine area of the moon, astronaut Alfred M. Worden, command module pilot, remained with the Command and Service Module (CSM) in lunar orbit.