Elementary astronomy; a beginner's text-book (1899)
Holden, Edward Singleton, 1846-1914 · New York, H. Holt and company · leaf 378
l beparallel straight lines. A straight line in space seen by an observeris projected as a great circle of the celestial sphere, with theobserver at its centre. If we draw a line from the observer parallelto the paths of the meteors, the direction of that line intersects thecelestial sphere in a… … Fig. 190.—The RADIANT POINT of a Meteoric Shower. Earth. If we also knew the velocity with which they are really mov-ing in space, we could make allowance for the motion of the Earth, 354: ASTRONOMY. and thus determine the direction of their actual motion in space, anddetermine the orbit of the…
Astronomy
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