The measurements suggested that the radius of the planet's central metallic core is greater than 800 miles (1,300 kilometers) but less than roughly 1,250 miles (2,000 kilometers). Radio tracking of Mars Pathfinder provided a precise measure of the lander's location and Mars' pole of rotation.Rounded pebbles and cobbles at the landing site, and other observations, suggested conglomerates that formed in running water during a warmer past in which liquid water was stable.Atmospheric Structure Instrument/Meteorology Package: Measured the Martian atmosphere during Pathfinder's descent to the surface, and provided meteorological measurements at the lander.Three Cameras: provided images of the surrounding terrain for geological studies, and documented the performance and operating environment for Pathfinder mission technologies.
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