A new treatise on astronomy, and the use of globes : in two parts ... (1866)
M'Intire, James, 1799-1879 · New York : Published by A.S. Barnes & Burr ... · leaf 132
ed eye ; others, on the con-trary, are splendid in their appearances. 166. Parts op a Comet. Comets are composed ofthree principal parts, namely, the nucleus, the head, andtail. (See the drawing.) The most brilliant central andcondensed part is called the nucleus, around which is anebulous envelope… … Great Comet of 1811. ceeds from the head, in a direction opposite to the sun,and expands sometimes to a great distance, is called thetail of the comet. Ordinarily, the tail is curved, havingthe concave side towards that part of the orbit fromwhich the comet is just receding. The smaller comets,have…
Astronomy
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