Jupiter, being the largest planet, presents the most challenging atmospheric entry mission ever undertaken by NASA. The design of the Galileo Probe calls for a massive heat shield to protect the instruments during the high-speed entry phase. After the Probe has slowed to subsonic velocities, a parachute will be deployed, and the heat shield, having done its job, will be dropped free. GALILEO ORBITER SCIENCE INVESTIGATIONS Project Scientist: T. V. Johnson, JPL Investigation Principal Investigator Primary Objectives Solid state imaging M. J. S. Belton, Kitt Provide images of Peak Observatory Jupiter’s (Team Leader) atmosphere and its satellites; study atmospheric structure and dynamics on Jupiter; investigate the composition and geology of the satellite surfaces; study the active volcanic processes on Io. Ultraviolet spectrometer C. W. Hord, U. Study composition and Colorado structure of the upper atmospheres of Jupiter and its satellites. Near-infrared mapping R. W. Carlson, JPL Provide spectral spectrometer (NIMS) images and reflected sunlight spectra of Jupiter’s satellites, indicating the composition of their surfaces; measure reflected sunlight and thermal emission from Jupiter’s atmosphere to study composition, cloud