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A rather lengthy total solar eclipse occurred on July 11, 1991. On that
particular day, the Moon was at the closest possible distance from the Earth (a.k.a.,
perigee) whereas the Sun was virtually near its most maximum distance from the Earth
(a.k.a. aphelion). According to the July issue of Astronomy
magazine, the Moon was 222,202 mi from Earth and the Sun was nearly
94.5 × 106 mi away.
Using this information, the following is intended to demonstrate that on this day the
relative positions of the Moon & Sun from the Earth allow for a "total" solar eclipse...
![]() Begin by noting that the average radius of the moon is 1080 mi and that the Sun's average radius is 432,300 mi... Note: Distances between astronomical bodies are from center to center. |