Jones, H. Spencer (Harold Spencer), 1890- · London E. Arnold & co. · leaf 267
rent from that ofthe Earth. As Venus has no sateUite, the mass must be found by themethod of perturbations. This method gives a more reliableresult in the case of Venus than in that of Mercury. Themost probable value of the mass is 1/403,490 that of the Sun,or about 0-826 of that of the Earth. The…
Astronomy
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