Turner, H. H. (Herbert Hall), 1861-1930 · London, E. Arnold · leaf 50
82, and it was hoped that these would giveopportunities of a special kind for the measure-ment of this important quantity, which lies at theroot of all our knowledge of the exact masses anddimensions of not only the sun, but of the planetsas well. The method may be briefly summarised thus :An… … SUN Fig. I. earth, the distance of the sun, and the relativedistance of Venus be known, it can be calcu-lated what this difference in path will be.Now the relative distance of Venus is knownwith great accuracy, from observing the time ofher revolution round the sun ; the size of theearth we can…
Astronomy
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