Elementary astronomy; a beginner's text-book (1899)
Holden, Edward Singleton, 1846-1914 · New York, H. Holt and company · leaf 254
above the southern horizon as mentravelled southwards, or above the northern horizon as theytravelled northwards. It was well known in his time that a journey of a fewhundred miles to the north or south would change thehorizon of an observer so that new stars became visible.Such short journeys… … Fig. 148.—An Ellipse.AC = 2a is the major axis; BD = 2b is the minor axis. The popular opinion for many centuries was that the Earthwas a flat disk everywhere surrounded by water. The Earth is not a sphere, but a spheroid. If it is cutby meridian planes (through the poles) the curves cut outof its…
Astronomy
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