Planets - Planet Distance Mass Exploration Orbit Temperat...

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Planet Distance Mass Exploration Orbit Temperat ure Density Composition Water Atmosphere Magnetic Field Satellites Visibility Mercury Sumerians 3 rd BC 0.38 AU (1 st ) 3.30e23 kg Mariner 10/Messenger (1974/75) Only 45% mapped Eccentric Rotation three times in two years 90 K to 700 K 5.43 gm/cm3 (2 nd ) Large Iron core, silicate outer shell Water ice in some craters Very thin. Consists of atoms blown from surface by solar winds (Constantly replenished) Small (1% of Earth’s) None Naked Eye Venus 0.72 AU (2 nd ) 3.30e23 kg Mariner 2 (1962) 20 others Soviet Venera First to land on a planet Most Circular Slow Retrograde Always face earth 740K+ 5.204 gm/cm3 (2 nd ) Large Iron core, molten rocky mantle Once. Now quite dry. Clouds of sulfuric acid, mostly carbon dioxide. Close pressure to earth. Strong greenhouse None None Naked Eye Earth 1 AU (3 rd ) 5.972e24 kgkg +14 Celcius Most Dense (5.5?) Iron core Iron, Oxygen, silicon, magnesium Only one with Liquid form Carbon Dioxide for Greenhouse, oxygen, Nitrogen Yes - moderate 1 - Moon Naked Eye
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Planets - Planet Distance Mass Exploration Orbit Temperat...

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