Lockyer, Norman, Sir, 1836-1920 · London : Macmillan and Co. · leaf 244
hetube is moved the more must it be inclined. Now wemay liken the drop to rays of light, and the tube to thetelescope, and we find that to see a star we must inclineour telescopes in this way. By virtue of this, each staireally seems to describe a small circle in the heavens,representing on a small… … fi^. 42.—Showing how a ray coming from a star in die direction A B change*its direction, in consequence of the refraction of the atmosphere. upon the relative rapidity of the motion of the tube andof the drop ; and we learn from the actual dimensions ofthe circle that light travels about 10,000…
Astronomy · Solar system
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