Johnson's natural philosophy and key to philosophical charts : illustrated with 500 cuts; being reduced photographic copies of all the diagrams contained in the author's philosophical series of indestructible school charts ; for the use of schools and families (1878)
rcury. The line of his nodes, ST, as shown, is in the 16th degreeof Taurus, and 16th degree of Scorpion. Now, if the earth is in Taurus,on the line, TS, when Mercury is at his ascending node, T, he will seem ASTRONOMY. 451 to pass upward over the suns disk, like a dark spot, as represented intJie… … the sun. As shown in the diagram, the earth passes the ascendingnode of Mercury in November, and the descending node in May. Thelast transit of Mercury took place Nov. 4, 1868. There will be fourmore during the present century; two in May, and two in November. 881. The calculation of transits.—To…
Physics · Astronomy
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