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 299
the line of nodes, to be definedJDresently, by the Greek letter co: the time of perihelion passageby T. With these four earmarks and with the aid of Keplersimproved laws it is possible to determine the position of thebody in its orbit at any given time. In place of a we maychoose the period P or… … Fig. 15. The Orbit of the Earth and of a Comet. In Figure 15 we see the Earths orbit. Its plane may betaken as a reference plane. Then we see the plane of the orbitof a comet which in this case is a parabola. The orbit planesintersect in a straight line called the line of nodes and at agiven angle.…
Astronomy
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