History of Physical Astronomy: From the Earliest Ages to the Middle of the 19th Century. Comprehending a Detailed Account of the Establishment of the Theory of Gravitation by Newton, and Its Development by His Successors; with an Exposition of the Progress of Research on All the Other Subjects of Celestial Physics |
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Page 73
... visible to the spectator ) , does not maintain a fixed position , but oscillates continually round a mean state . Hence the moon will appear to librate continually to and fro in the plane of her motion . In the same letter Newton ex ...
... visible to the spectator ) , does not maintain a fixed position , but oscillates continually round a mean state . Hence the moon will appear to librate continually to and fro in the plane of her motion . In the same letter Newton ex ...
Page 103
... visible before the end of 1758 , or the beginning of 1759. " Where- fore , " says this illustrious astronomer , " if it should return according to our prediction about the year 1758 , impartial posterity will not refuse to ac knowledge ...
... visible before the end of 1758 , or the beginning of 1759. " Where- fore , " says this illustrious astronomer , " if it should return according to our prediction about the year 1758 , impartial posterity will not refuse to ac knowledge ...
Page 134
... visible ; for every year from 1815 to 1833 , and for every two years throughout the remaining part of the orbit . He has fixed the 9th February , 1887 , as the time of the next return to perihelion . In 1818 , a comet was dis- covered ...
... visible ; for every year from 1815 to 1833 , and for every two years throughout the remaining part of the orbit . He has fixed the 9th February , 1887 , as the time of the next return to perihelion . In 1818 , a comet was dis- covered ...
Page 138
... visible at all to the naked eye , would be so about the middle of October , when it attained its nearest distance to the Earth . The event fully justified this prediction . On the evening of the 5th of August the comet was seen for the ...
... visible at all to the naked eye , would be so about the middle of October , when it attained its nearest distance to the Earth . The event fully justified this prediction . On the evening of the 5th of August the comet was seen for the ...
Page 139
... visible by the action of Jupiter in 1767 , and was subsequently thrown into an orbit of larger dimensions , and rendered invisible by the action of the same planet in 1779. The discovery of a new comet revolving in an elliptic orbit ...
... visible by the action of Jupiter in 1767 , and was subsequently thrown into an orbit of larger dimensions , and rendered invisible by the action of the same planet in 1779. The discovery of a new comet revolving in an elliptic orbit ...
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History of Physical Astronomy: From the Earliest Ages to the Middle of the ... Robert Grant No preview available - 2015 |
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action apparent diameter apparent magnitude appeared apsides ascertained assigned Astronomer Royal astronomers atmosphere axis calculated Cassini catalogue celestial bodies centre circumstance comet computed Connaissance des Temps consequence deduced determined discovered discovery disk disturbing force earth eccentricity effect elements ellipticity epoch equal equator errors exhibited geometer gravitation Halley Hence Hipparchus illustrious inclination inequality instrument investigation Jupiter Kepler labours Lagrange Laplace light limb longitude luminous lunar magnitude mass mean distance mean motion Mém method moon moon's Neptune Newton nodes object observations Observatory obtained occasion orbit parallax perihelion period perturbations phenomena phenomenon Phil physical planetary position principle proper motions radius vector rays reflecting telescope refraction remarked researches respect revolving right ascension ring Royal Royal Observatory satellite Saturn similar Sir William Herschel solar spots stars Struve sun's supposed surface tangential angle telescope theory tion total eclipse Trans Uranus variation Verrier visible
Popular passages
Page 30 - The third I now design to suppress. Philosophy is such an impertinently litigious Lady, that a man had as good be engaged in lawsuits, as have to do with her.
Page 207 - that every particle of matter in the universe attracts every other particle, with a force whose direction is that of the line joining the two, and whose magnitude is directly as the product of their masses, and inversely as the square of their distances from each other.
Page 40 - I know not what the world will think of my labors, but to myself it seems that I have been but as a child playing on the seashore, now finding some pebble rather more polished, and now some shell rather more agreeably variegated than another, while the immense ocean of truth extended itself unexplored before me.
Page xxi - I will indulge in my sacred fury; I will triumph over mankind by the honest confession that I have stolen the golden vases of the Egyptians* to build up a tabernacle for my God far away from the confines of Egypt.
Page 166 - Formed a design in the beginning of this week, of investigating, as soon as possible after taking my degree, the irregularities in the motion of Uranus, which are yet unaccounted for; in order to find whether they may be attributed to the action of an undiscovered planet beyond it; and if possible thence to determine the elements of its orbit, etc. approximately, which would probably lead to its discovery.
Page xxi - It is now eighteen months since I got the first glimpse of light, three months since the dawn, very few days since the unveiled sun, most admirable to gaze on, burst out upon me. Nothing holds me: I will indulge in my sacred fury ; I will triumph over mankind by the honest confession, that I have stolen the golden vases of the Egyptians to build up a tabernacle for my God, far from the confines of Egypt.
Page 512 - ... urgently requested to look at the moon and planets through my glass, which he pertinaciously refuses to do. Why are you not here ? "What shouts of laughter we should have at this glorious folly, and to hear the Professor of Philosophy at Pisa labouring before the Grand Duke, with logical arguments, as if with magical incantations, to charm the new planets out of the sky.
Page 360 - I forbear to mention the chill and damp with which the darkness of this eclipse was attended, of which most spectators were sensible, and equally judges, or the concern that appeared in all sorts of animals, birds, beasts, and fishes upon the extinction of the sun ; since ourselves could not behold it without some sense of horror.
Page 253 - Saturn, perhaps, devoured his children ? Or were the appearances indeed illusion or fraud, with •which the glasses have so long deceived me as well as many others to whom I have shown them...
Page 450 - Royal was established in 1765, the duty of the incumbent was declared to be " to apply himself with the most exact care and diligence to the rectifying the Tables of the Motions of the Heavens, and the places of the Fixed Stars in order to find out the so much desired Longitude at Sea for the perfecting -the Art of Navigation.