A new manual of the elements of astronomy, descriptive and mathematical .. (1868)
Kiddle, Henry, 1824-1891 · New York, Ivison, Phinney, Blakeman & co.; Chicago, S.C. Griggs & co. · leaf 107
the centre of the sun, E the place of the earth. Then S AE is a right-angled triangle, in which the hypothenuse SE is the distance ofthe sun from the earth, A S the radius of the sun, and the angle A E S Question^.—c. What is the sine of an angle? d. Give the general rule. 146.What is the apparent… … one-half the apparentdiameter, or 16. Theratio corresponding tothis angle, or the sineof the angle, is .00466;hence, 91,500,000 X.00166 = 426,390, thesemi-diameter of the sun ; and, therefore, the diameter is 852,780 miles, which is very nearly its exact length. 148. The figure of the sun appears…
Astronomy
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
