A short course in astronomy and the use of the globes (1871)
Kiddle, Henry, 1824-1891 · New York, Chicago, Ivison, Blakeman, Taylor & co. · leaf 135
rlier date have also beenrecognized. 215. Enckes Comet is remarkable for its shortperiod and frequent returns. Its period and elliptic orbit were determined byProfessor Encke at itsfourth recorded appear-ance in 1819. Its last re-turn took place in 1868,This comet has generallyappeared without any… … ENCKE S COMET. 216. Lexells Comet.— This body is particularlynoted for the amount of disturbance which it has suf-fered in passing among the planets. From observationsmade in 1770, Lexell calculated its period to be about 215. What account is given of Enckes comet ? 216. Of Lexells comet ? What…
Astronomy
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