Lockyer, Norman, Sir, 1836-1920 · London : Macmillan and Co. · leaf 321
why it wasrequisite in 1769, and will be again necessary in 1882, togo so far from home to observe them. Let us take the transit of 1882. We already know theinstant and place (true perhaps to a second of time and 2S6 ASTRONOMY. arc) at which the planet v/ill enter and leave the solardisc; in other… … ■SabrirCa LandCFig. 63.—Illuminated side of the Earth at Ingress, Dec 6d. ah. ingress and egress. Fig. 61 will show how the planet willappear to cross the Sun as seenfrom the Earth. Fig. 62shows the same circle with lines reversed, representingthe points of ingress and egress, as viewed in the…
Astronomy · Solar system
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