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Earth-Moon distance

Author:      marjorie e smith
How far away is the Moon from the Earth?  

Response #:  1 of 1
Author:      hawley
A good "rule of thumb" value to remember is a quarter million miles.  More
precisely, the Moon's orbit is elliptical:  its average orbital radius is
384401 km, apogee (farthest distance from the Earth) is 406700 km, and
perigee (distance of closest approach to the Earth) is 356400 km.
Extra credit:  what do we call the closest and farthest orbital distances of
planets around the Sun?  (hint:  they begin with peri- and apo-)

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