Mattison, Hiram, 1811-1868 · New York, Huntington and Savage, Mason and Law · leaf 147
is the Envel-ope ?f A thin misty wrapper or covering surrounding the nucleus. (See E in the cut.) 675. What is the Tail of a Comet ? An expansion or elongation of the envelope, extend-ing off in one direction from the nucleus. (See T inthe cut.) 676. Have all Comets these three parts ? * No-cle-us,… … They have not. Some havea nucleus and no envelope;some no perceptible nucleus;and others a nucleus and envel-ope, but no tail. [A comet that appeared in 1585 had simplyan envelope, as shown in the cut. Enckes,comet is another of this kind. See cut, page143. In 1682 one was seen as round and…
Astronomy
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