A compendium of astronomy; containing the elements of the science, familiarly explained and illustrated, with the latest discoveries. Adapted to the use of schools and academies, and of the general reader (1850)
Olmsted, Denison, 1791-1859 · New York, R. B. Collins · leaf 113
What is the eccentricity of the ellipse ? How many el-lipses may there be having a common focus 1 Explain figure2§ How eccentric is the earths orbit ? 100 UNIVERSAL GRAVITATION. center is called the eccentricity of the ellipse ; and theellipse is said to be more or less eccentric, as the distanceof… … ellipses around the common focus F, the innermost AGDhaving a small eccentricity or varying little from a cir-cle, while the outermost ACB is a very eccentric ellipse.The orbits of all the bodies that revolve about the sun,both planets and comets, have, in like manner, a com-mon focus in which the…
Astronomy
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