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perigee (noun) the nearest point on the moon's orbit round the earth.

The moon is at perigee when it is the nearest to the earth in the course of its orbit round the earth. That is the opportune time for spaceships to be sent to the moon, as at that point the distance between the moon and the earth is less than at other points.

  • The orbit of the moon being elliptical, it is not at the same distance from the earth all the time. If the apogee is its farthest point from the earth, the perigee is its nearest point from the earth.
  • The landing on the moon and other connected activities are planned with the moon's perigee in view. While it makes for a reduction in the distance, it also makes possible a clearer view of the satellite.
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Last Modified : 11-May 2009
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