The elements of theoretical and descriptive astronomy, for the use of colleges and academies (1901)
White, Charles J. (Charles Joyce), 1839-1917 · New York, J. Wiley & sons; · leaf 250
and n the ratio of the circumferenceof a circle to its cameter, or 3.1416. The. compression, or oblaisness, of an oblate spheroid is theratio of the difference between the major and the minor axis ofthe generating ellipse to the major axis. 21. The hyperbola is a plane curve, in which the… … 246 APPENDIX. The two fixed points are called the foci, and the middle pointof the line joining them is called the centre.22. The parabola is a plane curve, everypoint of which is equally distant from afixed point, and from a right line given inthe plane. Thus, in Fig. 83, in which ABis the given…
Astronomy
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