The World of CometsS. Low, Marston, Searle & Rivington, 1877 - 548 síđur |
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according amongst ancients announced aphelion Apollonius of Myndus apparition apparition of comets Aristotle astronomers atmospheric meteors beliefs Biela bolides Cćsar calculated celestial bodies century Chaldeans Clairaut comet appeared cometary astronomy cometary orbits curve death described Diodorus Siculus direction discovered diurnal motion Donati's comet duration earth eccentricity elliptic elements elliptic orbit Encke Encke's comet Ephorus epoch equal fact Faye's comet gravitation Halley Halley's comet heavens hyperbolic hypothesis ideas inclination influence Jupiter Laugier law of Kepler longitude luminous major axis mean distance motion move movement Myndus nebulosity Newton node nucleus number of comets observed occupied opinion parabolic elements parabolic orbit perihelion distance perihelion passage periodical comets perturbations phenomena philosopher Pingré planetary planets positions prediction presage prodigies Qućstiones Naturales radius vector regarded region remark retrograde SECTION seen Seneca solar system stars superstition suppose tail true velocity visible Winnecke Yvon Villarceau