Collins, A. Frederick (Archie Frederick), 1869- · New York, London, D. Appleton and company · leaf 134
before,appear suddenly and in any partof the sky, though they may bevery dim at first, and after a whilethey fade away, sometimes neverto return again. Second, they shine chiefly withtheir own light like the stars;third, they do not travel in smallcircles around the Sun like the planets; but the… … Fig. 129.—An Ellipse, Para-bola and Hyperbola. ai4 THE BOOK OF THE STARS the planets and Sun, but shoot in and out of our solar systemfrom and to every direction; and fifth and last, they travel atenormously high speeds. Now, a comet, however great it may grow to be, never burstsinto view, big,…
Astronomy · Stars
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