Astronomy with an opera-glass: a popular introduction to the study of the starry heavens with the simplest of optical instruments, with maps and directions to facilitate the recognition of the constellations and the principal stars visible to the naked eye; (1888)
Serviss, Garrett Putman, 1851-1929 · New York, London, D. Appleton and company · leaf 110
debaran and Gamma, are the Thetas.These stars present a very pretty appearance, viewed with agood glass, the effect being heightened by a contrast of colorin the two Thetas.The little pairsoutheast of Alde-baran, called theSigmas, is also abeautiful object.The distance apartof these stars isabout… … The Hyades. 100 ASTRONOMY WITH AN OPERA-GLASS. may observe. It will also be found an interesting test ofthe eye-sight to endeavor to see these stars as doubles with-out the aid of a glass. Persons having keen eyes will beable to accomplish this. North of the star Epsilon will be seen a little group…
Astronomy
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