Mar’s Facts

• amplifies the seasons

• Diameter = 0.53 Earth
  • angular size and distance away
  • Mass = 0.11 Earth
    • from orbits of Phobos and Deimos
    • therefore density = 3.9 gm/cm3
      • Smallest of the terrestrial planets
        • less extensive Fe core (only 15% Fe)
      • small size implies faster cooling
        • surface area to volume ratio is large
      • probably no molten Fe in core
        • presently magnetic field is very weak
          • magnetic dynamo requires liquid conductor

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