Sharpless, Isaac, 1848-1920, Philips, G. M. (George Morris), 1851-1920, joint author · Philadelphia, J.B. Lippincott company · leaf 196
the planets at-traction changed the comets orbit completely. The coma1 is the envelope immediately surroundingthe nucleus. It usually shades off from it, so that nodistinct line of separation can be seen. Frequently itis composed of a series of circular bands of light, asin the drawing on the… … Fig. 45.—Coggias Comet, 1874. till entirely lost. It usually broadens as it recedes fromthe head. It also is extremely thin and rare. Evenvery faint stars can be seen through it. In the case of 192 ASTRONOMY.
Astronomy
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