Irving, [Christopher], d. 1856. [from old catalog], Ortmann, Anselm. [from old catalog] · Baltimore, Md., New York, J. Murphy company · leaf 89
stars? A. Neptunes motion among the stars is direct,or eastward, for 6f months and retrograde, or west-ward, for 5^ months of the year. Q. 16. Has Neptune any satellites? A. Neptune has one satellite which was discoveredby Lassell in 1846, a few weeks after the discovery ofNeptune; it has not… … Fig. 19. Swifts Comet of 1892. COMETS. 71 Q. 18. What is peculiar about its motion? A. Its motion is retrograde in its orbit which is in-clined to the plane of the ecliptic by an angle of notquite 35^. CHAPTER XIX. Comets. Q. 1. What are comets? A. Comets are heavenly bodies which usually con*sist…
Astronomy
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