The Adolfo Stahl lectures in astronomy, delivered in San Francisco, California, in 1916-17 and 1917-18, under the auspices of the Astronomical Society of the Pacific (1919)
Astronomical Society of the Pacific, Aitken, Robert Grant, 1864-1951 · San Francisco Stanford University Press · leaf 298
lyafter an infinite time, or not at all. The hyperbola also is acurve which passes off to infinity, so that a body moving in itwill never return. It is ,clear at once that bodies moving inparabolas or hyperbolas might be considered as visitors fromouter space, which after revolving around the Sun… … Fig. 14. Two Ellipses, Showing How the Angle w Defines thePosition of an Orbit in Its Own Plane. Figure 14 exhibits two ellipses. The axes lie in differentdirections with reference to the horizontal line. The anglebetween a fixed reference line and the axis is another earmarkof the orbit. It tells…
Astronomy
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