Elementary astronomy; a beginner's text-book (1899)
Holden, Edward Singleton, 1846-1914 · New York, H. Holt and company · leaf 303
ominences. Itis brightest around the edgeof the Sun, and fades off toward its outer boundary by Fig. 163.-A Method of Ob- . .U1 -, ,. i,. serving the Sun with a insensible gradations. This Telescope. halo of light is called the corona, and is a very striking object during a total eclipse. (Fig.… … THE SUN. 283 eye-pieces are made so that the Sun can be looked at directly withthe telescope, but the method of projecting the Suns image on asheet of cardboard (as in the figure) is very convenient, especiallybecause several observers can examine the image at the same time.A sheet of white…
Astronomy
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