Lectures on astronomical theories . Tin pencd (solar period) of Ift^ i^mH is yuo (?neo-lif 2i yein) Tke lerrestrial prrio^ u at present reckoned, according to the theory a/cnmetary orhit», at daya. Thii ve eonnder, aceordin.,jo the law of gravitation, npreKenU 3 orbital relurru ^f the co;(m1. Whertfare 2,410, dioiiUA by 3, equaU 803j. But the earlArequtre* 146 days to eompUu the leveTUh (annuo/) orbit, and taking the velocity ^ the comet al an»-haifthat tif the earth, 2,4Hi+a90=J7OO And 2700, divided by 3, eguaU 90G dayt, tohieh ie, therefore, the lolar period.^f- pant Hill teu CO
Lectures on astronomical theories . Tin pencd (solar period) of Ift^ i^mH is yuo (?neo-lif 2i yein) Tke lerrestrial prrio^ u at present reckoned, according to the theory a/cnmetary orhit», at daya. Thii ve eonnder, aceordin.,jo the law of gravitation, npreKenU 3 orbital relurru ^f the co;(m1. Whertfare 2,410, dioiiUA by 3, equaU 803j. But the earlArequtre* 146 days to eompUu the leveTUh (annuo/) orbit, and taking the velocity ^ the comet al an»-haifthat tif the earth, 2,4Hi+a90=J7OO And 2700, divided by 3, eguaU 90G dayt, tohieh ie, therefore, the lolar period.^f- pant Hill teu COMETARY ORBITS IN RELATION TO THE LAW OF GRAVITATION JOHN ¥: ^ H. LOVELL PRINTING AND PUIiLISHING COMPANY. JULY, 1876. LECTURE FOURTH. Masses of Aggregated Mattek and their Rela-tion TO the Laws of the Material Universe. The assumption that masses of matter, revolving aroundcentres of gravitating influence in the neighbourhood of,but not belonging to, the solar system, may approachsufficiently near to be visible from the earth, will perhapsenable us to understand and give a reasonable explana-tion of some of those obseived facts of astronomy, whichat present occupy the position of mechanical effects ap-parently governed and regulated by laws unknown to orunrecognized by mechanical science. We allude more par-ticularly to those very various bodies at present group-ed and classed together under the name comet. Plate 16,from the (^Encyc. Britannica), is an example of the illus-trations given at the present time in astronomical works,of the supposed orbital revolution of a comet around thesun. In some cases the orbital path is considered to be
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Keywords: ., bookcentury18, bookdecade1870, booksubjectastronomy, bookyear1876
