330 



CATALOGUE. — ASTRONOMV, STARS. 



Faneied he had foundan annual parallax of 40" or 45" ; 

 tlie polar distance being greatest in June. 

 Cassini on the magnitude and distance of 



the fixed stars. A. P. 17 17^ 256. H. 62. 

 Halley. Pli.tr. 1720. 1. 



Says, that the apparent diameter of Sirius cannot be seve- 

 ral seconds, as Cassini makes it. 



Halley on the infinity of the sphere of fixed 

 stars. Ph. tr. 1720. XXXI. 22. 



Asserts that the equilibrium could not be maintained 

 without an infinite number. 



Bradley. Ph. tr. 1728. XXXV. 637. 



Tliinks he would have perceived an annual parallax if it 

 had amounted to 1". 



Clairaut on the hest determination of the 

 parallax of the stars. A. P. 1739. 3o8. 

 H. 42. 



Maskelyneon finding the annual parallax of 

 Sirius. Ph. tr. 1760.889. 



Conjectures, from La Caille's observations, that it may 

 be 8" or 0". 

 Lambert's Photometria. 



Supposing Saturn to reflect i of the Kght that falls on him, 



' and to be equal in brightness to a star as large as the sun, 



the distance of the star will be 425100 times as great as 



that of the sun, and its apparent diameter 0"' 16"". Hence 



we may assume the distance about 500000. 



Michell on the probable parallax of the 

 stars. Ph. tr. I767. 234. 



From their light. 



jVlichellon the distance and magnitude of 

 the fixed stars. Ph. tr. 1784. 35. 



Observes, that a star of 500 times the diameter of the sun 

 ought to recall the particles of light from an infinite distance, 

 and thinks that a sensible eflect might be produced by a 

 star 22 times as large in diameter as the sun : tlie attraction 

 of the sun ought to retard it -xi^r,^ in an infinite distance. 

 The light of a stsr of the sixth magnitude is to that of the 

 sun as one to 100 billions. 



Herschel on the parallax of the fixed stars. 

 Ph. tr. 1782. 82. 



With figures of their telescopic appearances. Makes Lyra 

 subtend 3553". 



Herschel on the sua and fixed stars. Ph. tr. 

 1795. 46. 



Some stars, if as remote from each other as Sirius is from 

 the sun, should be 42000 times as far off as Sirius. At this 

 distance Sirius would scarcely be visible. 



Herschel on the power of penetrating into 

 space by telescopes. Ph. tr. 1 800. 49- Nich. 

 IV. 496. 



A cluster of 5000 stars barely visible as a mass, by the 4» 

 feet telescope, must be above 11 millions of millions of miU 

 lions of miles off. 



Proper motion of the Star^. 



Bernard's chronology of the places of the 



stars. Ph. tr. 1684. XIV. 567. 

 Delisle on the proper motion of the stars; A, 



P. 1727. 19- 

 Cassini on the proper motion of the stars-. 



A. P. 1738. 273. H. 70. 

 Hornsby on the proper motion of Arcturus. 



Ph.tr. 1773.93. 

 Mayer de motu fixarura proprio. Op. ined. 



I. 175. 

 Herschel on the motion of the sun and solar 



system. Ph. tr. 1783. 247. 



Supposes the motion, not slower thaathat of the earth iiv 

 its orbit. 



Changeable Stars and new Stars. 



Hevelius's new star in theswan. Ph.tr. l665i 

 I. 372. A second of the third magni- 

 tude. Ph. tr. 1670. V. 2087. Further 

 accounts Ph. tr. I67I. VI. 2197,2198. 



BuUialdi ad astronomos monita duo. 

 Acc.Ph.tr. 1665-6. I. 381. 



A new star in the whale. 



Anthelme's new star in the swan. Ph. tr» 



1670. V. 2092. A. P. I. 87. 

 Cassini on the changeable star in the whale's 



neck. A. P. I. 87. X. 422. 

 Kirchiiis de Stella nova in collo cygni. Misc. 



Berl.Ph.tr. 1715.226. 



