- 産業: Astronomy
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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 ...
A 10 µm to 1-meter-size natural solid object moving in interplanetary space. Meteoroids may be primary objects or derived by the fragmentation of larger celestial bodies, not limited to asteroids. Meteoroids between 10 µm (microns) and 2 mm in size are called "micrometeoroids. "
Industry:Astronomy
Interdisciplinary science that overlaps with geochemistry, geology, astronomy, astrophysics, and geophysics to discover the materials and fundamental processes in the solar nebula and our Solar System. These sciences give us complementary ways of looking at our origins by addressing questions like, How did the Sun and planets form? Where did we come from? Cosmochemistry, because it is a careful examination of the building blocks of the cosmos, also plays an important role in developing local resources on the Moon, Mars, and asteroids, essential to sustained human presence in space.
Industry:Astronomy
Dark-colored, fine-grained extrusive igneous rock with about 52 to 63 weight percent silica (SiO<sub>2</sub>). Andesite consists mainly of plagioclase and one or more mafic minerals. The word andesite is derived from the Andes Mountains, located along the western edge of South America, where andesite rock is common.
Industry:Astronomy
The visible light in the sky produced when a meteoroid passes through Earth's atmosphere (can also refer to the glowing meteoroid itself).
Industry:Astronomy
A small, mostly rocky body orbiting the Sun. Asteroids range in size from 1000 kilometers in diameter to tiny objects you could hold in your hand. Most asteroids orbit the Sun between Mars and Jupiter (the Asteroid belt), and are the source of most meteorites. Principal asteroids are: 1 Ceres (a dwarf planet), 2 Pallas, 3 Juno, and 4 Vesta. The majority of asteroids fall into three types: C-type (carbonaceous), S-type (silicate or stony), and M-type (metallic).
Industry:Astronomy
Scientist who studies Earth, its structure, its materials, the physical and chemical processes and changes that occur on the surface and in the interior, and the history of the planet and its life forms. Planetary geologists extend their studies to the Moon, planets, and other solid bodies in the Solar System.
Industry:Astronomy
Stene nastale na površini zemlje kao rezultat fizičkih, hemijskih i bioloških procesa
Industry:Astronomy
A compound formed by combining one carbon atom with two oxygen atoms, making the molecule CO<sub>2</sub>. Carbon dioxide is an important part of the atmospheres of Venus and Mars. Carbon dioxide gas condenses to a solid below -78° C. This solid is commonly known as dry ice. The polar ice caps on Mars are made of frozen water and carbon dioxide.
Industry:Astronomy
Naturally occurring inorganic solid with a definite chemical composition and crystal structure.
Industry:Astronomy
A local day on a planet, defined by its period of rotation. On Mars, for example, a local day lasts 24 hours and 37 minutes. During the Mars Pathfinder mission, scientists began counting Sols with the successful landing of the spacecraft on July 4, 1997 (Sol 1). Images from the Mars Pathfinder mission always contain a reference to the Sol on which it was taken.
Industry:Astronomy
