- 産業: Astronomy
- Number of terms: 6727
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Planetary Science Research Discoveries (PSRD) is an educational site sharing the latest research by NASA-sponsored scientists on meteorites, asteroids, planets, moons, and other materials in our Solar System. The website is supported by the Cosmochemistry Program of NASA's Science Mission ...
The second in NASA's Discovery program of low-cost spacecraft with highly focused science goals, Mars Pathfinder landed successfully on Mars on July 4, 1997. Images, science results, and engineering data were released on the World Wide Web throughout, and beyond, the primary mission dates (July 4 - August 3, 1997. ) The Jet Propulsion Laboratory, Pasadena, CA, developed and managed the Mars Pathfinder mission for NASA's Office of Space Science, Washington, D. C. JPL is a division of the California Institute of Technology (Caltech).
Industry:Astronomy
Group of asteroids with similar orbital elements (distance from the Sun, inclination of the orbital plane to the Earth's orbital plane, and eccentricity of the orbit) thought to be remnants of one larger asteroid parent.
Industry:Astronomy
Crack extending far into a planet or moon through which magma travels to and erupts onto the surface.
Industry:Astronomy
Rocks that have recrystallized in a solid state as a result of changes in temperature, pressure, and chemical environment.
Industry:Astronomy
The forceful striking of one body, such as a meteorite, against another body such as a moon or planet.
Industry:Astronomy
Chemical zonation caused by differences in the densities of minerals; heavy materials sink, less dense materials float. Differentiation transforms an initially homogeneous body into a body with compositionally distinct core, mantle, and crust.
Industry:Astronomy
The region around Earth dominated by Earth's magnetic field. In this region, the Earth's magnetic field lines guide the motions of charged particles (ions and electrons).
Industry:Astronomy
United States federal agency. "NASA is an investment in America's future. As explorers, pioneers, and innovators, we boldly expand frontiers in air and space to inspire and serve America and to benefit the quality of life on Earth. " -from the NASA Strategic Plan.
Industry:Astronomy
