Todd, David P. (David Peck), 1855-1939 · New York, Cincinnati [etc.] American book company · leaf 431
on infrequent occasions they streak the heavens by hundreds and thousands, for hours at a time, as in November of 1799 and 1833. These are known as meteoric showers. Careful watching has revealed the very important fact, that practically all the luminous streaks of a shower, if prolonged backward,… … To Illustrate the Radiant Point Notice that the luminous paths are longer, the farther they are from the radiant ; if a meteor were to meet the earth head on, its trail would be foreshortened to a point, and charted within the area of the radiant itself. About 300 such radiant points are now
Astronomy
Internet Archive · The Library of Congress · Public domain (published before 1931). Free to use for anything.
