Because of the influence of the Sun and other perturbations, the Moon's orbit around the Earth is not a precise ellipse. Nevertheless, different methods have been used to define a . provided a formula for the of the Moon as viewed from opposite sides of the Earth, involving terms. This is equivalent to a formula for the inverse of the distan.
[pdf] In 1941, science fiction writer published the science fiction short story "", in which a space station transmits energy collected from the Sun to various planets using microwave beams. The SBSP concept, originally known as satellite solar-power system (SSPS), was first described in November 1968. In 1973 was granted U.S. patent number 3,781,647 for his.
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