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THE VISIBLE STARS. 



What occupies the Space beyond the Limits of the Solar System. Wide Vacuity between thi* Sys- 

 tem and the Stars. Indications of this observable in the Motions of the Planet* Iudiciit':>n* in \ 

 the Motions of the Comets. The immense Distance of the Stars proved by the Earth's uniwa! ) 

 Motion. Observations made at Greenwich. Besscl's Discovery of the Parallax. The conse<]:ient S 

 Dist:in.-e of tho Stars. Illustrations of the Magnitude of this Distai.ce. The different Orders and 

 Magnitudes of the Stars. How accounted for. Why those of the lowest Magnitude arc most Nu- 

 merous. The real Magnitude of the Stars. The Telescope unable to Magnify them Dr. 

 WoMastoa's Investigations of the comparative Brightness and Magnitude of the Stars in Relation 

 to the Sun. Their stupendous Magnitude. Application of this to the Dog-star. 



