| Mercury (planet) |
Article Index for Mercury |
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Information AboutMercury (planet) |
Mercury () is the innermost and smallest to approach Mercury was Mariner 10 from 1974 to 1975 , which mapped only 40%–45% of the planet’s surface. Physically, Mercury is similar in appearance to the Moon as it is heavily Cratered . It has no Natural Satellite s and no substantial Atmosphere . The planet has a large Iron Core which generates a Magnetic Field about 0.1% as strong as that of the Earth .1 Surface temperatures on Mercury range from about 90 to 700 K (−180 to 430 °C), with the Subsolar Point being the hottest and the bottoms of craters near the Poles being the coldest. '' (बुध), after the son of '' Chandra '' (the Moon). The Chinese , Korean , Japanese , and Vietnamese cultures refer to the planet as the ''water star'' (水星), based on the Five Elements . In Vietnamese, it is called ''Sao Thuy''. ''Thuy'' means water and ''Sao'' means star. The Hebrews named it ''Kokhav Hamah'' (כוכב חמה), “the star of the hot one” (“the hot one” being the Sun). Mercury is Smaller (though still more massive) than two of the natural satellites in our solar system, Ganymede and Titan . INTERNAL STRUCTURE Mercury is one of the four Terrestrial Planet s, being a rocky body like the Earth. It is the smallest of the four, with a diameter of 4879 km at its Equator . Mercury consists of approximately 70% Metal lic and 30% Silicate material. The density of the planet is the second highest in the solar system at 5.43 g/cm³, only slightly less than Earth’s density. If the effect of gravitational compression were to be factored out, the materials of which Mercury is made would be denser, with an uncompressed density of 5.3 g/cm³ versus Earth’s 4.4 g/cm³.2 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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