Saturn and Its System: Containing Discussions of the Motions (real and Apparent) and Telescopic Appearance of the Planet Saturn, Its Satellites, and Rings; the Nature of the Rings; the Great Inequality of Saturn and Jupiter; and the Habitability of Saturn. To which are Appended Notes on Chaldæan Astronomy, Laplace's Nebular Theory, and the Habitability of the Moon; a Series of Tables with Explanatory Notes; and Explanations of Astronomical TermsLongman, Green, Longman, Roberts, & Green, 1865 - 252 страници |
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Страница 8
... described to re- present the orbit of the earth about s the sun ; and with the same centre let P P ' , part of a large circle , be described to re- present Saturn's orbit , of which as yet nothing is supposed to be known but that it is ...
... described to re- present the orbit of the earth about s the sun ; and with the same centre let P P ' , part of a large circle , be described to re- present Saturn's orbit , of which as yet nothing is supposed to be known but that it is ...
Страница 6
... described would be strictly exact . The results obtained would be affected only by errors of observation , of construction , or of calculation . To such errors , at first , the astronomers of old must have been inclined to attribute the ...
... described would be strictly exact . The results obtained would be affected only by errors of observation , of construction , or of calculation . To such errors , at first , the astronomers of old must have been inclined to attribute the ...
Страница 11
... described as subject to an annual decrease of 19 " -54 . This is to be understood as re- ferring to the retrograde motion in longitude of the ascending node . Since the pre- cession of the equinoxes is 50 " -1 yearly ( in longitude ) ...
... described as subject to an annual decrease of 19 " -54 . This is to be understood as re- ferring to the retrograde motion in longitude of the ascending node . Since the pre- cession of the equinoxes is 50 " -1 yearly ( in longitude ) ...
Страница 23
... departure from his heliocentric path - or approaches nearest to the ecliptic - in the synodical revolution considered . described above . The following consideration may assist the student THE SIMPLER ELEMENTS OF SATURN'S ORBIT . 25.
... departure from his heliocentric path - or approaches nearest to the ecliptic - in the synodical revolution considered . described above . The following consideration may assist the student THE SIMPLER ELEMENTS OF SATURN'S ORBIT . 25.
Страница 24
... described above . The following consideration may assist the student : - Since Saturn is seen on his heliocentric path whenever the earth is at n or n ' , his geocentric path crosses his heliocentric path once in every six months ; now ...
... described above . The following consideration may assist the student : - Since Saturn is seen on his heliocentric path whenever the earth is at n or n ' , his geocentric path crosses his heliocentric path once in every six months ; now ...
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Често срещани думи и фрази
angle aphelion appear ascending node astronomers atmosphere attractions body breadth celestial sphere Chaldæans circle conjunction considered corresponding Crown 8vo dark ring density determined diameter diminish disturbing division eccentricity ecliptic Edition effects ellipse equal equatorial equinox figure heliocentric hemisphere Herschel horizon inclined increase inner edge inner satellites interval Jupiter Jupiter's latitude less line of nodes line of sight longitude lunar major axis mean distance meridian miles moon moon's move nearly northern observer on earth opposition outer edge outer ring outline parallel path perihelion period phenomena plane of Saturn's planetary Plate pole position present quadrature R. A. Proctor represent respectively retrograde motion ring's plane rotation satellites Saturn Saturn's disc Saturn's globe Saturn's orbit Saturn's ring Saturnian seen shadow sidereal sidereal period solar southern spheroid stars sun's centre supposed synodical revolution Table telescope tion variations velocity vernal equinox vis viva vols Woodcuts