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A typical Southern California haze hung over Pasadena last week, but at the Jet Propulsion Laboratory there was much less concern about the local weather than about conditions on Mars, some 80 million miles away. As scientists monitored the pictures and scientific data being transmitted from Mariner 9, in its...
Mysterious Silence. Despite the storm, readings taken by Mariner's infrared spectrometer enabled JPL investigators to identify several earthlike minerals in the Martian crust, including quartz, granite and anorthocite. Those findings caused considerable excitement among the scientists. They indicated that Mars had at one point in its history undergone...
Other findings reported by Mariner included atmospheric pressure and temperature readings, irregularities in the gravity field and a description of the bulge around Mars, which gives the planet 1.2 miles more girth at the equator than at the poles.
The Russians, for their part, continued to maintain a mysterious silence about the progress of their twin craft Mars 2 and Mars 3. Western scientists had expected Mars 2 to arrive at the red planet by week's end. Mars 3 five days later. As the days passed without...
Mariner's cameras have another assignment: photographing the tiny Martian moons, Phobos and Deimos. In fact, before last week's rendezvous they managed to catch 19 long shots of the outer moon, Deimos, and two of Phobos. In the course of the mission, scientists hope for much closer...