A new manual of the elements of astronomy, descriptive and mathematical .. (1868)
Kiddle, Henry, 1824-1891 · New York, Ivison, Phinney, Blakeman & co.; Chicago, S.C. Griggs & co. · leaf 50
to denote them : Questions.—59. When is a planet in opposition ? a. Which planets can be in oppo-sition ? b. What is the angular distance of a planet in conjunction ? In opposition ?60. What is elongation ? 61. Quadrature ? a. Where is quadrature relatively to con-junction and opposition? b.… … In the diagram, the graduated semicircle cuts the sides of all the angleswhich have their vertices at E, and serves to measure the angular distanceof each planet from the sun. V and V represent Venus in superior andinferior conjunction, the elongation being, at those points, 0° ; while at V,it is…
Astronomy
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