Newcomb, Simon, 1835-1909, Holden, Edward Singleton, 1846-1914, joint author · New York, H. Holt · leaf 427
Fig. 110—great comet op 1811. recent times has afforded so favorable an opportunity forstudying its physical constitution. Some of the results ofthe observations made upon it hove already been presented. … Fig. 111.—donatts comet of 1858. ENCKES COMET. 409 Its greatest brilliancy occurred about the beginning ofOctooer, when its tail was 40° in length and 10° in breadthat its outer end. Donatis comet had not long been observed when itwas found that its orbit was decidedly elliptical. After…
Astronomy
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