Howe, Herbert A. (Herbert Alonzo), 1858-1926 · Meadville, Penna., Flood and Vincent · leaf 283
l nebu- The tail forms. 276 A Study of the Sky. Umbrella-likeforms. The tail. losity of the comets head. The formation of envelopesa less violent and more orderly procedure. These 15 umbrella-shaped forms rise toward the sun one afteranother at intervals of some hours, as if the cometwere… … Fig. 125.—Jets and Envelopes. comets are their most characteristic features. Oftenthey are tens or even hundreds of millions of milesin length. Occasionally they are nearly straight, butusually they have the graceful contour of the plume ona knights crest. The material projected toward thesun by…
Astronomy
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
