The Geography of the Heavens, and Class Book of Astronomy: Accompanied by a Celestial Atlas |
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Results 6-10 of 48
Page 48
... changes from a star of the 2d mag- nitude so as to become invisible once in 334 days , or about 7 times in 6 years . Herschel makes its period 331 days , 10 hours , and 19 minutes ; while Hevelius assures us that it once disappeared for ...
... changes from a star of the 2d mag- nitude so as to become invisible once in 334 days , or about 7 times in 6 years . Herschel makes its period 331 days , 10 hours , and 19 minutes ; while Hevelius assures us that it once disappeared for ...
Page 50
... changes recur . The periodical variation of Algol was determined in 1783 , by John Goodricke of York ( Eng . ) to be 2 days , 20 hours , 48 minutes , and 56 seconds , Dr. Herschel attributes the variable appearance of Algol to spots ...
... changes recur . The periodical variation of Algol was determined in 1783 , by John Goodricke of York ( Eng . ) to be 2 days , 20 hours , 48 minutes , and 56 seconds , Dr. Herschel attributes the variable appearance of Algol to spots ...
Page 51
... changes in the lustre of the stars , so satisfactorily , that we certainly need not look out for any other cause . " دو It is said , that the famous astronomer Lalande , who died at Paris in 1807 , was wont to reinain whole nights , in ...
... changes in the lustre of the stars , so satisfactorily , that we certainly need not look out for any other cause . " دو It is said , that the famous astronomer Lalande , who died at Paris in 1807 , was wont to reinain whole nights , in ...
Page 67
... changes at different periods ; whence it has been conjectured by various astronomers that Pollux must vary from the 1st to the 3d magnitude . ) ( But Herschel , who observed these stars for a period of 25 years , ascribes the variation ...
... changes at different periods ; whence it has been conjectured by various astronomers that Pollux must vary from the 1st to the 3d magnitude . ) ( But Herschel , who observed these stars for a period of 25 years , ascribes the variation ...
Page 72
... changes its position in respect to the seasons . How long is light in coming from Sirius to the earth ? Suppose this star were now to be blotted from the heavens , how long before its twinkling would expire ? How was the rising of ...
... changes its position in respect to the seasons . How long is light in coming from Sirius to the earth ? Suppose this star were now to be blotted from the heavens , how long before its twinkling would expire ? How was the rising of ...
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Common terms and phrases
3d magnitude 4th magnitude ancient angle appear Arcturus Argo Navis Aries astronomers Auriga axis Beta brightest called Cassiopeia celestial centre Cepheus circle cluster colure comet constellation Cor Caroli declination degree Delta Denebola diameter direction distinguished diurnal motion Earth east ecliptic equal equator equinoctial figure fixed stars Gamma globe head heavenly bodies heavens Hercules Herschel horizon Jupiter latitude length Libra light longitude Mars mean distance Mercury meridian millions of miles minutes Moon Moon's motion naked eye nearest nearly nebulæ night node north pole northern hemisphere observed orbit Orion parallax passing perihelion period Perseus phenomena planets Pleiades polar star principal star represented revolution revolve right ascension rise satellites Saturn seasons seen side sidereal Sirius situated small stars solar system solstice southern spots square Sun's supposed surface Taurus telescope tion triangle Ursa Venus vernal equinox Virgo visible whole number Zeta Zodiac
Popular passages
Page 158 - And God made two great lights; the greater light to rule the day, and the lesser light to rule the night: he made the stars also. And God set them in the firmament of the heaven to give light upon the earth, and to rule over the day, and over the night, and to divide the light from the darkness: and God saw that it was good. And the evening and the morning were the fourth day.
Page 152 - Canst thou bind the sweet influences of the Pleiades, Or loose the bands of Orion? Canst thou bring forth Mazzaroth in his season? Or canst thou guide Arcturus with his sons?
Page 27 - Aries, Taurus, Gemini, Cancer, Leo, Virgo, Libra, Scorpio, Sagittarius, Capricornus, Aquarius, Pisces; the whole occupying a complete circle, or broad belt, in the heavens, called the Zodiac.
Page 100 - Cleaves to his back; a famish'd face he bears; His arms descend, his shoulders sink away, To multiply his legs for chase of prey. He grows a wolf, his hoariness remains, And the same rage in other members reigns.
Page 112 - Dan shall be a serpent by the way, An adder in the path, That biteth the horse heels, So that his rider shall fall backward.
Page 165 - It is worthy of particular notice, that the point from which the meteors seemed to emanate was observed, by those who fixed its position among the stars, to be in the constellation Leo; and, according to their concurrent testimony, this radiant point was stationary among • the stars during the whole period of observation — that is, it did not move along with the earth in its diurnal revolution east...
Page 162 - I was called up to see the shooting of the stars, as it is commonly called. The phenomenon was grand and awful ; the whole heavens appeared as if illuminated with sky-rockets, which disappeared only by the light of the sun after day-break. The meteors, which at any one instant of time appeared as numerous as the stars, flew in all possible directions, except from the earth...
Page 163 - The first appearance was that of fireworks of the most imposing grandeur, covering the entire vault of heaven with myriads of fireballs, resembling skyrockets.
Page 127 - So high in air, and set her on the clift, Where far above thy world she dwells alone, And proudly makes the strength of rocks her own ; Thence wide o'er Nature takes her dread survey, And with a glance predestinates her prey ? She feasts her young with blood ; and, hovering o'er Th' unslaughter'd host, enjoys the promis'd gore.
Page 163 - ... and the stars of heaven fell unto the earth, even as a fig tree casteth her untimely figs, when she is shaken of a mighty wind.