Jones, H. Spencer (Harold Spencer), 1890- · London E. Arnold & co. · leaf 308
s was first sug-gested by Hevehus, who noticed that the path of a comet wascurved near periheHon. It was proved by Doerfel for the par-ticular case of the comet of 1681 that the path was aparalbolawith the Sun in the focus. A method for determining theparabohc orbit of any comet was first given by…
Astronomy
Internet Archive · Cornell University Library · Public Domain Mark 1.0. Free to use for anything.
