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accuracy actual Almagest angle appears apse line Aristotle astronomical attraction axis Bradley Bradley's calculation catalogue celestial bodies celestial sphere centre century B.C. chapter vm circle Clairaut comet Coppernicus D'Alembert deduced direction discovery distance earth eccentricity eclipse epicycle equant equator error estimate Euler explained fact fixed stars Galilei geometrical gravitation Greek Greek astronomy hence Herschel Hipparchus idea important inequalities instruments irregularities Jupiter Kepler known Lagrange Laplace less longitude lunar theory Mars mathematical mathematicians measured Mercury method minor planets months moon moon's moving nearly nebulae Newton nutation observations Observatory orbit parallax path period perturbations planets pole position precession Principia probably problem Ptolemy Ptolemy's published recognised regarded Regiomontanus represented result revolution revolving round rotation round the sun satellites Saturn scientific seen shewed shewn sidereal sidereal period solar system spherical sun and moon sun's superior planet tables telescope tion transit of Venus Tycho Venus
Page 242 - I do not know what I may appear to the world, but to myself I seem to have been only like a boy playing on the sea-shore, and diverting myself in now and then finding a smoother pebble or a prettier shell than ordinary, whilst the great ocean of truth lay all undiscovered before me.
Page 337 - I have seen double and treble nebulae variously arranged; large ones with small, seeming attendants ; narrow, but much extended lucid nebulae or bright dashes; some of the shape of a fan, resembling an electric brush issuing from a lucid point...
Page 445 - THE REALM OF NATURE An Outline of Physiography. By HUGH ROBERT MILL, D.Sc. Edin.; Fellow of the Royal Society of Edinburgh ; Oxford Lecturer. Maps and 68 Illustrations. 12mo, $1.50 net. CONTENTS : Story of Nature— Substance of Nature — Power of Nature — The Earth a Spinning Ball — The Earth a Planet — The Solar System and Universe — The Atmosphere — Atmospheric Phenomena — Climates — The Hydrosphere — Bed of the Oceans — Crust of the Earth — Action of Water on Land — -Record...
Page 340 - They are now seen to resemble a luxuriant garden, which contains the greatest variety of productions, in different flourishing beds ; and one advantage we may at least reap from it is, that we can, as it were, extend the range of our experience to an immense duration. For, to continue the simile I have borrowed...
Page 165 - Every body continues in its state of rest or of uniform motion in a straight line, except in so far as it may be compelled by impressed forces to change that state.
Page 14 - The Ram, the Bull, the Heavenly Twins And next the Crab, the Lion shines, the Virgin and the Scales, The Scorpion, Archer and Sea-Goat, the Man that holds the Watering Pot, And Fish with Glittering Tails.
Page 212 - In the beginning of the year 1665 I found the method of approximating Series and the Rule for reducing any dignity of any Binomial into such a series.
Page 226 - To every action there is always an equal and contrary reaction ; or the mutual actions of any two bodies are always equal and oppositely directed.
Page 261 - At last I conjectured that all the Phenomena hitherto mentioned, proceeded from the progressive Motion of Light and the Earth's Annual Motion in its Orbit. For I perceived that, if Light was propagated in Time, the apparent Place of a fixed Object would not be the same when ' the Eye is at Rest, as when it is moving in any other Direction, than that of the Line passing through the Eye and the Object ; and that, when the Eye is moving in different Directions, the apparent Place of the Object would...