Jacoby, Harold, 1865-1932 · New York, The Macmillan company · leaf 409
rance of motions of approach. So astronomers assume that in the average of so large a number of stars (in this case, 280) there will be as many motions in any one direction as in any other. Therefore, a preponderance of motions of approach near the apex must be due to solar motion, not to motion of… … opposite sides of a ^U2 ., , ,. Fig. 99. Determination of the Apex (Herschel). street, the angular dis- tance between them will seem much larger when they are viewed from H2 than from Hi. A person walking from Hi to H2 will see this increase of the angular distance. Apply- ing this principle to the…
Astronomy
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