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)
sun and moons nodes will sustain the same relation to each otheras at the beginning, and a new cycle of eclipses begins. This cycle iscalled the period of the eclipses. 905. Figure 13.—Why eclipses are not more frequent. —If the moons orbit lay in tlie plane of the ecliptic, instead of formingan… … plane of the ecliptic, it is evident that she may be either above or belowthe ecliptic at the time of her conjunctio?i with the sun, as shown atE and H, in the figure, so she will seem to joass either above or belowhim, and will not cause a solar eclipse. For the same reason, the moonmay pass…
Physics · Astronomy
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