Proctor, Richard A. (Richard Anthony), 1837-1888 · New York, R. Worthington · leaf 168
Newtons comet) andothers ; and he found that they all accord with the law ofgravity. But before long, Newtons friend and pupil, Halley,•effected a yet more remarkable discovery. In hopes of con-firming Newtons views by results founded on actual obser-vation, he collected all the records of comets… … twenty-four. Among these, three presented a remarkablesimilarity. One appeared in 1531, and was described byAppian ; another appeared in 1607, and was observed by 158 MYSTERIES OF TIME AND SPACE. Kepler ; the third was traced by Halley himself in 1682.The equality of the intervals between these…
Astronomy
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
