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Cette carte conceptuelle, cree avec IHMC CmapTools, contient des informations liees a : Martian Calendar, Eccentricity of Martian Orbit show Very Slow Variation with Time, Day measured in Reference Frame, Martian Orbital Elements includes Year, Time for Mars to rotate about its axis is ~24 hours 40 minutes, 7 Days make up Earth Weeks, Day is Time for Mars to rotate about its axis, Tilt of Rotation Axis to Orbital Plane show Very Slow Variation with Time, Seasonal Phenomena include Polar Caps, Mars Week may be 7 Sols, Eccentricity of Martian Orbit is Much greater for Mars (0.093) vs Earth (0.017), Martian Orbital Elements includes Day, Variation in length in Four Seasons, Time for Mars to orbit Sun is ~687 Earth Days, Seasons determined by Eccentricity of Martian Orbit, ~25 degrees compares with ~23 degrees for Earth, Astronauts will need to schedule Other Activities, Very Slow Variation with Time results from Gravitation influence of Other Planets, Astronauts will need to schedule Leisure, Practical Martian Calendar for Astronauts, ~687 Earth Days compares with ~365 Days for Earth