Tuesday, March 22, 2011
The Moon at Perigee
Last Saturday night the full Moon occurred when the Moon was as close to Earth as it has been in about 20 years. The Moon's orbit is not circular, but rather elliptical. When the moon is closest to Earth it is called "perigee" and when it is furthest away it is called "apogee." So on Saturday night the perigee Moon was about 7 percent larger than average. Next October the full Moon will be the furthest away, and it will be 7 percent smaller than normal, for a difference in size between large and small of 14 percent. That is a huge difference in size. So I photographed the moon, and will save this photograph until next October, and post this again with another photo of the smaller moon. THAT will be an interesting comparison.
Posted by Ken Spencer at 8:26 PM