Star-land : being talks with young people about the wonders of the heavens (1891)
Ball, Robert S. (Robert Stawell), Sir, 1840-1913 · London ; Paris : Cassell & Co. · leaf 174
ith their width.They are all pretty and graceful figures, and are often usefulfor ornamental work. The ellipse is a pretty shape forbeds of flowers in a grass-plot. The importance of the ellipse to astronomers is greaterthan that of any other geometrical figure. In fact, all theplanets as they… … Fig. 54.—Specimens of Ellipses. It is also important to observe that the sun is not inthe centre of the ellipse which the planet describes. Thesun is nearer to one end than to the other. And the actualposition of the sun must be particularly noted. Suppose 160 Star-Land. that some mighty giant were…
Astronomy
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