The instruments are designed to investigate the global geology, surface composition and temperature, and the atmospheric pressure, temperature and escape rate of Pluto and its moons. ... After studying the fascinating images, Grunsfeld said the team saw "flowing ices, exotic surface chemistry, mountain ranges," and a "diversity of planetary geology that is truly thrilling." ...
It is said that Mercury rotates three times for every two trips around the sun, so that during Planets 3 every alternate perihelon passage the same face points directly at the sun. " Geologically, the most remarkable features of Mercury are compressional cliffs or faults, just the sort of wrinkles that might form in the crust if the interior of the planet shrank slightly " (Morrison, 74, 1993). ...