Willson, Robert Wheeler, 1853-1922 · Boston, New York Ginn & company · leaf 174
ance from the ecliptic, whichmay be found thus (Fig. 85) : THE MOTIONS OF THE PLANETS igl 5 = Z/r = angular distance (radians) of planet above ecliptic asseen from the sun. Combining this with Z=Uxi (radians), asexplained on page 157, b (radians) = — i (radians); and turning each side of the… … GEOCENTRIC POSITIONS When a planet has been placed on the diagram by its heliocentriccoordinates, we may find its position as seen from the earth; thatis, we may find the longitude and latitude of that point of thecelestial sphere upon which it is seen projected by an observerupon the earth. The…
Astronomy
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