Planetary Exploration

Apollo astronauts belts biological bright and dark bright areas California Carl Sagan century circulation cloudtops composition Condon Lectures continental drift craters dark areas detected disequilibrium domestic robots Earth Earth's atmosphere Earth's surface elevation differences emission epoch example experiment FIGURE fly-by geology human imagine impact infrared interest Jupiter kilometer lander landing large crater Lunar Orbiter lunar surface mankind Martian Mercurian Mercury meters methane military molecules Moon Moon and Planets NASA observations Ocean oxygen particles physics picture planetary exploration Planetary Studies Portland State University possible produced radar radiation radio region resolution robots rotation satellite Saturn scientific seen sense significance solar system Soviet Union space exploration space vehicle spacecraft spectrum stars stilted lumps sunlight surface of Venus surface temperature Syrtis Major telescope terrestrial microorganisms theory thermal tiny tion ultraviolet University of Oregon upper van Allen belts vicinity visible voyages of discovery wavelengths