Lockyer, Norman, Sir, 1836-1920, Seabroke, G. M. (George Mitchell), 1848-1918 · London, Macmillan and co. · leaf 51
near the equator, andvery near the ecliptic—in fact, near the intersection ofthe two fundamental planes wliieh are supposed to cross 28 STARGAZING: PAST AND PRESENT. [book I, each other. If I can observe the distance, measuredalong the equator, between the moon and a star, I shallhave obtained the… … Fig. 9.—Ecliptic Astrolabe (the ArmilLe Zodiacales of Tyclio Bralie), similar tothe one used by Hipparchus. me the position of the star. This method of observa-tion was an extremely good one for the time, but itcould only have been used during an eclipse of themoon, and when the sun was so near the…
Astronomy · Telescopes
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