Berry, Arthur,b. 1862 · London, J. Murray · leaf 263
.—Mars in opposition. … Fig. 69.—The parallax of a planet. the length of one of its sides being thus known, thelengths of the other sides are readily calculated. The result of an investigation of this sort is often mostconveniently expressed by means of a certain angle, from § 161] Parallax 207 which the distance in terms…
Astronomy
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