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 256
ius was discovered, by Mr. Alvan Clark, of New York, to have a minute companion star situated about 7 from it. c. Colored Stars.—There is considerable diversity in the color ofboth the single and double stars. Thus Vega, Altair, and Spica arewhite ; Aldebaran, Arcturus, and Betelgeuse, ruddy ;… … Questions.—a. Apparent distance of double stars? 6. Comparative size and color fSize of the members of double stars ? Examples ? c. Difference in the color of singlestars ? Of double stars ? Complementary colors ? Presented by how many stars J 252 THE STARS. double stars exhibit the beautiful and…
Astronomy
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