Elements of astronomy ... with explanatory notes, and questions for examination (1855)
Brocklesby, John, 1811-1889 · New York, Farmer, Brace & co. · leaf 42
e horizon, which takes the direction V^HH1, is neces- What inference is made in view of the facts adduced] How is the period of rotationdivided 1 What does Chapter Second treat of] What is the meaning of the term hori-zon ? Give the meaning of the term sensible horizon, and explain from figure 1 34… … HORIZON EXPLAINED. the two planes is usually so small that they are generallyregarded as coinciding; the plane of the horizon beingsupposed to pass through S. 37. Eational Horizon. The second or rational hor-izon is a vast imaginary circle whose plane passesthrough the centre of the earth, dividing…
Astronomy
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