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Jennie Worden's List: Final frontier

  • Dec 29, 08

    According to a recent estimate (Fraser, 1987), there are about forty calendars used in the world today

    • The principal astronomical cycles are the day (based on the rotation of the Earth on its axis), the year (based on the revolution of the Earth around the Sun), and the month (based on the revolution of the Moon around the Earth).
    • The Gregorian Calendar

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  • Dec 29, 08

    Profile of crew of Endeavour 18

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