An introduction to astronomy : designed as a text book for the students of Yale College (1846)
Olmsted, Denison, 1791-1859, Yale College (1718-1887) · New York : Collins, Brother & Co. · leaf 57
to find the hypo-thenuse CE, which is the distance of the moon from the centerof the earth. 32 THE EARTH. REFRACTION. 88. While parallax depresses the celestial bodies subject to it,refraction elevates thetn; and it affects alike the most distantas well as nearer bodies, being occasioned by the… … increasing rapidly in density (as is known to be the fact) in ap-proaching near to the surface of the earth. Let S be a star, fromwhich a ray of Hght Sa enters the atmosphere at a, where, beingturned towards the radius of the convex surface, it would changeits direction into the line ah, and again…
Astronomy
Internet Archive · Public Domain Mark 1.0. Free to use for anything.
