The sidereal messenger of Galileo Galilei : and a part of the preface to Kepler's Dioptrics containing the original account of Galileo's astronomical discoveries . n the heavens within very narrow precincts. Near these there lie more than forty others invisible to the naked eye, no one of which is much more than half a degree off any of the aforesaid six; of these I have noticed only thirty-six in my diagram. I have preserved their intervals, magnitudes, and the distinction between the old and the new stars, just as in the case of the constellation Orion. The Milky Thc ucxt objcct which I have
The sidereal messenger of Galileo Galilei : and a part of the preface to Kepler's Dioptrics containing the original account of Galileo's astronomical discoveries . n the heavens within very narrow precincts. Near these there lie more than forty others invisible to the naked eye, no one of which is much more than half a degree off any of the aforesaid six; of these I have noticed only thirty-six in my diagram. I have preserved their intervals, magnitudes, and the distinction between the old and the new stars, just as in the case of the constellation Orion. The Milky Thc ucxt objcct which I have observed is the Way consists entirely of esscucc or substaucc of the Milky Way. By the aid stars in countless of a tclcscopc auy one may behold this in a manner numbers and of various wdilch SO dlstluctly appeals to the senses that all the magnitudes. disputes which have tormented philosophers throughso many ages are exploded at once by the irrefragableevidence of our eyes, and we are freed from wordydisputes upon this subject, for the Galaxy is nothingelse but a mass of innumerable stars planted togetherin clusters. Upon whatever part of it you direct the. Star-duster in. Orions Head 4- -T- + + ^^ + + * 4- :K- + + + + 4- + + 4- 4- + + 4- ^ + 4- + 4- + 4- ^ Star-cluster of Praesepo ,n CaneGalileoSidereus Nuncius, Yen ice, 1610. THE SIDEREAL MESSENGER. 43 telescope straightway a vast crowd of stars presentsitself to view; many of them are tolerably large andextremely bright, but the number of small ones isquite beyond determination. And whereas that milky brightness, like the bright- Nebuise re- _ , . , , . -, , . 1 solved into ness 01 a white cloud, is not only to be seen m the dusters ofMilky Way, but several spots of a similar colour shine here and there in the heavens, if you turn the orioasHeadtelescope upon any of them you will find a cluster ofstars packed close together. Further—and you willbe more surprised at this,—the stars which have beencalled
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Keywords: ., bookauthorgalileigalileo1, bookcentury1800, booksubjectastronomy
