Mercury ndeimwe yemapuraneti mana epasi muSolar System, uye ibwe rakafanana nePasi. Iyo ipuraneti diki muSolar System, ine equatorial radius ye2,439.7 km (1,516.0 mi). Mercury idikiwo<unk>kunyangwe yakakura kwazvo<unk>kupfuura makuru masatellite muSolar System, Ganymede naTitan. Mercury inoumbwa neanenge 70% simbi uye 30% silicate zvinhu. Mercury's density ndiyo yechipiri yepamusoro muSolar System pa5.427 g/cm3, chete zvishoma kudarika Earth's density ye5.515 g/cm3. Kana iko kusunganidzwa kwegravitational kwakange kwave kuwanikwa kubva kune ese ari maviri mapuraneti, Mercury yaive yakakura sei mukati meSolar System, uye yaive yakakura zvakakura sei?
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