Jones, H. Spencer (Harold Spencer), 1890- · London E. Arnold & co. · leaf 106
e that it takes tomake an orbital revolution about the Earth. That this is so will be readily seen from Fig. 34.E denotes the position of the Earth, Ma the centre of the Moonat any instant and A the point on the Moons surface in theline EMa- At any subsequent instant suppose the centre ofthe Moon… … Fig. 34.—Rotation of Moonon its Axis. 92 GENERAL ASTRONOMY have moved to B when M^ moved to M^. Observation shows,however, that A moves to G. Therefore, whilst the Moon hasmoved relatively to the Earth through an angle MoEM^, ithas turned on its axis through an angle BM^G. But sinceM^B and M^A are…
Astronomy
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