The comets: a descriptive treatise

according amongst appearance approached arrival assigned astronomers attraction August Author axis Berlin Bessel bodies bright Burckhardt calculated Cambridge century China Chinese close College comet computed constellation coruscations December described detected determined diameter direction Discovered distance earth Edition effects elements elliptical Encke English epoch Europe exhibited extended February finds four give given Halley Halley's head heavens Hind History identity interest Italy January July June Jupiter later length less light March mean Mechain mentioned Messier middle miles month motion naked eye nearly nebulosity Notes November nucleus numbers observed Octavo October Olbers orbit parabolic Paris passed path perihelion passage period Pingré planet planetary position present probable Professor recorded remarked represented respecting Rome Second Edition seen Sept September short space stars supposed tail telescope third tions train visible Volumes week