Star-land; being talks with young people about the wonders of the heavens (1899)
Ball, Robert Stawell, Sir, 1840- [from old catalog] · Boston and London, Ginn & company · leaf 33
lination of his two eyes whendirected at it. In a similar way we judge of the dis-tance of a heavenly body by making observations on itfrom two different stations. I shall illustrate our method of measuring the actualdistance of a body in the heavens by showing you howwe can find the height of that… … Fig. 4. — Two Eyes are better than One. pie as that by which we measure the distance of the sunor of any other celestial body which we cannot reach.I will ask the aid of a boy and a girl, who will pleasestand one at each end of the lecture table. The appa-ratus we shall want is very simple ; it…
Astronomy
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