Contents
vii
CHAPTER VI.
PERIODIC COMETS OF SHORT PERIODS.
Periodic Comets conveniently divided into 3 classes.—Short-period Comets in two groups.—Comets in Group I.—Encke's Comet.—The supposed Resisting Medium in space.—Its supposed effect on Encke's Comet.—Brief summary of its History.—The Resisting Medium theory not generally accepted.—Remarkable Observations in 1871.—Tempel's Second Periodical Comet (1873, ii.).—Winnecke's Comet.—Brorsen's Comet.—Tempel's First Periodical Comet (1867, ii.).—Tempel(3)-Swift's Comet.—Finlay's Comet.—D'Arrest's Comet.—Wolf's Comet.—Holmes's Comet.—Brooks's Second Periodical Comet (1889, v.).—Faye's Comet. Tuttle's Comet.—Short-period Comets in Group II.—Barnard's First Periodical Comet (1884, ii.).—Brooks's First Periodical Comet (1886, iv.).—Barnard's Second Periodical Comet (1891, iv.).—Spitaler's Comet (1890, vii.).—Perrine's Comet (1896, vii.).—Kopffs Comet.—Giacobini's Second Periodical Comet (1900, iii.).—Swift's Second Periodical Comet (1889, vi.).—Borelly's Comet (1905, ii.).—Swift's First Periodical Comet (1885, ii.).—Denning's Second Periodical Comet (1894, i.).—Metcalfs Comet (1906, vi.).—Denning's First Periodical Comet (1881, v.).—Giacobini's First Periodical Comet (1896, v.). |
58–85 |
CHAPTER VII.
LOST COMETS.
Lexells Comet.—Its mysterious disappearance.—Efforts made to identify other Comets with it.—Biela's Comet.—Its division into 2 portions.—Its disappearance.—Di Vico's Comet.—Other supposed Short-period Comets which have never been seen a second time.—Grischau's Comet.—Helfenzrieda's Comet.—Pigott's Comet.—Blainpain's Comet.—Peters's Comet.—Coggia's Comet. |
86–95 |
CHAPTER VIII.
PERIODIC COMETS OF LONG PERIODS.
Periodic Comets of between 70 and 80 years.—Westphal's (1852, iv.).—Pons's (1812).—Di Vico's (1845, iv.).—Olbers's (1815).—Brorsen's (1847, v.).—Halley's.—Particulars of each of these Comets.—Return of Pons's Comet in 1883.—Observations of it by Trépied and others.—Many comets no doubt revolving in elliptic orbits, but with periods of hundreds or thousands of years.—Selected List of some of these.—The Comets of 1264 and 1556.—The Comets of 1532 and 1661. |
96–101 |
