Newcomb, Simon, 1835-1909, Holden, Edward Singleton, 1846-1914, joint author · New York, H. Holt · leaf 408
is also often brighterand more sharply defined at one edge than at the other. The above description applies to comets which can beplainly seen by the naked eye. After astronomers beganto sweep the heavens carefully with telescopes, it wasfound that many comets came into sight which wouldentirely…
Astronomy
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