The stars and their mysteries : an interestingly written account of the wonders of astronomy, told in simple language (1916)
Gibson, Charles R. (Charles Robert), 1870-1931 · Philadelphia : J.B. Lippincott Co. ; London : Seeley, Service & Co., Ltd. · leaf 135
occasionally. Now we wish to take a look atthe drawing which is marked Fig. 7. You see that the planet Mercury has thesmallest course to travel round, and that Venuscircles round outside Mercurys orbit, while theEarth comes next, and then the planet Mars. 127 OUR NEAREST NEIGHBOURS These are the… … Fig. 7.—The race-courses of the four planets nearest the Sun only way in which I can show you the wholeeight race-courses at one time is to draw themall on a very much smaller scale. You willunderstand that in the drawing (Fig. 8) thefour innermost race-courses are represented bythe tiny ring at…
Astronomy · Stars
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