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according acts altitude angle Annual Variat apogee appears apsides Aquarii arising assume Astronomy attraction axis becomes body CATALOGUE cause circle computed consequently consider Contains Continued correction declination density described determined diameter difference diminished direction distance draw earth ecliptic effect ellipse equal equation equinoxes EXAMPLE excentricity fixed force given gives gravity greater hence inclination increased inversely Jupiter latitude length Leonis less longitude Magnitude mean motion meridian moon moon's Names nearly nodes North obliquity observations orbit parallel periodic perpendicular planets polar pole position precession PRINCIPAL produce projection proportion quadratures quantity radius ratio represent respect revolve Right Ascension Rule Sagittarii signs sine sphere square Stars sun's supposed surface TABLE Tauri theory tide tion true varies Virginis whole x cos x sin
Page 121 - D'Alembert, was the Precession of the equinoxes and the Nutation of the earth's axis, according to the theory of gravitation.
Page 545 - System of Astronomy, by Mr. Vince, Plumian Professor of Astronomy and Experimental Philosophy. The fifth edition of an Analysis of the Greek Metres, by Dr. Scale. A Confutation of Atheism, from the Laws and Constitution of the Heavenly Bodies, by Professor Vince.
Page 125 - ... proves likewise, that if there be a gradual diminution of the obliquity of the ecliptic, it does not arise only from an alteration in the position of the earth's axis, but rather from some change in the plane of the ecliptic itself ; because the stars, at the end of the period of the moon's nodes, appeared in the same places, with respect to the equator, as they ought to have done, if the earth's axis had retained the same inclination to an invariable plane.
Page 121 - ... moves round p, in the circumference ABCD, with a retrograde motion likewise, in a period of the moon's nodes, or of 18 years, and 7 months. By this means, when the moon's ascending node is in Aries, and the true pole of the equator at A, is moving from A towards B ; it will approach the stars that come to the meridian with the sun about the vernal equinox, and recede from those that come with the sun near the autumnal equinox, faster than the mean pole p does.
Page 13 - Now if the sphere were evanescent in magnitude, with the same quantity of matter, the attraction would be the same, it being independent of a. Hence, the attraction of a corpuscle to a sphere is just the same as if all the matter of the sphere were collected into its centre.
Page 285 - The disappearance of some stars may be the destruction of that system at the time appointed by the Deity for the probation of its inhabitants, and the appearance of new stars may be the formation of new systems for new races of beings then called into existence to adore the works of their Creator."* The late Dr.
Page 221 - The day in which the moon passes the equator, the water stagnates there without any motion: as the moon removes from the equator, the water begins to rise and fall once a day ; and it is high water at the setting of the moon, and low water at her rising. This daily tide increases for about seven or eight days, and then decreases...
Page 13 - ... the sun by a force which varies inversely as the square of the distance...
Page 268 - ... demonstrated respecting motion in circular orbits. The planets then and their satellites being known by Kepler's laws to move in elliptical orbits, and to describe round the sun in one focus areas proportional to the times by their radii vectores drawn to that focus, and it being further found by those laws that the squares of their periodic times are as...
Page 285 - ... for enjoyment, ought to make us very thankful and humble before him. And that every being in the universe should be under his care, and training up here for the further enjoyment of him hereafter, is a thought, which, if duly impressed, would penetrate us with the deepest sense of gratitude to our Creator, and excite us to love and obedience. The disappearance of some stars may be the destruction of...