...Subsequently sodium and iron lines were found in cometary spectra... 
Garrett Serviss 「Curiosities of the Sky」
...He also directed his attention to the study of cometary bodies, andarrived at certain conclusions with regard to the nature of theirmovements...
Thomas Orchard 「The Astronomy of Milton's 'Paradise Lost'」
...The hydrocarbon bands are, however,not always the only features visible in cometary spectra...
Robert Stawell Ball 「The Story of the Heavens」
... or Cometary Planets? or...
Edward Singleton Holden 「Sir William Herschel: His Life and Works」
...The swarms travel along pathsthat resemble cometary orbits; they are very elongated ellipses,inclined at all angles to the plane of the ecliptic...
E. Walter Maunder 「The Astronomy of the Bible」
...'' Pogson searched in the place indicated and saw a cometary mass retreating into the southern heavens, where it was soon swallowed from sight!...
Garrett Serviss 「Curiosities of the Sky」
...Their eccentric and irregular paths may undergothe most enormous derangements; indeed, the history of astronomycontains many instances of the vicissitudes to which a cometary careeris exposed...
Robert Stawell Ball 「The Story of the Heavens」
...Indeed, in certain cases, jets of cometary material are actuallyprojected towards the sun...
Robert Stawell Ball 「The Story of the Heavens」
...As the time drew nigh, three-quarters of a century afterwards,astronomers were greatly interested in this first cometary prediction,and kept an eager look-out for "Halley's comet...
Oliver Lodge 「Pioneers of Science」
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