Herschel, John F. W. (John Frederick William), Sir, 1792-1871 · London : Longman, Rees Orme · leaf 300
its eclipses happen, like those of the rest, eachrevolution. (460.) These eclipses, moreover, are not seen, as is thecase with those of the moon, from the center of theirmotion, but from a remote station, and one whose situ-ation with respect to the line of shadow is variable.This, of course, makes… … (46l.) Suppose S to be the sun, E the earth in its orbitE F G K, J Jupiter, and a b the orbit of one of itssatellites. The cone of the shadow, then, will have itsvertex at X, a point far beyond the orbits of all thesatellites; and the penumbra, owing to the great distanceof the sun, and the…
Astronomy
Internet Archive · York University Libraries · Public Domain Mark 1.0. Free to use for anything.
