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 261
other multiple stars. Fig. 119. a. Examples are furnished by the following stars: e Ly rae, alreadyreferred to, which consists of twostars, each of which is double ;C Cancri (Zeta of the Crab), com-posed of three stars, two large andone small; d Orionis (Theta ofOrion), a very remarkable… … THE STAES. 257 star. From the configuration of the four principal stars this issometimes called the trapezium of Orion. (See Fig. 119.) As all thesestars have the same proper motion, they are believed to constituteone system. It is said that a seventh star belonging to this systemhas been…
Astronomy
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