History of Astronomy |
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Page iii
The mental capacity of one age does not seem to differ from that of other ages;
but it is the imagination of new points of view that gives a wider scope to that
capacity. And this is cumulative, and therefore progressive. Aristotle viewed the
solar ...
The mental capacity of one age does not seem to differ from that of other ages;
but it is the imagination of new points of view that gives a wider scope to that
capacity. And this is cumulative, and therefore progressive. Aristotle viewed the
solar ...
Page 1
During the infancy of each the succession of events can be watched, but there
can be no a priori anticipations. Experience alone, in both cases, leads to the
idea of cause and effect as a principle that seems to dominate our present
universe, ...
During the infancy of each the succession of events can be watched, but there
can be no a priori anticipations. Experience alone, in both cases, leads to the
idea of cause and effect as a principle that seems to dominate our present
universe, ...
Page 3
Even if these men were sometimes led to evolve laws of cause and effect which
now seem to us absurd, let us be tolerant, and gratefully acknowledge that these
astrologers, when they suggested such “working hypotheses,” were laying the ...
Even if these men were sometimes led to evolve laws of cause and effect which
now seem to us absurd, let us be tolerant, and gratefully acknowledge that these
astrologers, when they suggested such “working hypotheses,” were laying the ...
Page 11
... he adopted 365 days and added an intercalary day every four years (as in the
Julian Calendar). This may be true or not, but the ancient Chinese certainly seem
to have divided the circle into 365 degrees. To learn The Geometrical Period II.
... he adopted 365 days and added an intercalary day every four years (as in the
Julian Calendar). This may be true or not, but the ancient Chinese certainly seem
to have divided the circle into 365 degrees. To learn The Geometrical Period II.
Page 20
The short epitome so far given illustrates the extraordinary deductive methods
adopted by the ancient Greeks. But they went much farther in the same direction.
They seem to have been in great difficulty to explain how the earth is supported, ...
The short epitome so far given illustrates the extraordinary deductive methods
adopted by the ancient Greeks. But they went much farther in the same direction.
They seem to have been in great difficulty to explain how the earth is supported, ...
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accurate Airy ancient Astronomer Royal astronomical units bright calculations Cape catalogue centre century Chaldaeans Chinese comet Copernicus diameter discovered discovery earth Egyptian epicycles equatorial error excentric explain fact fixed stars Galileo Greenwich Halley heavenly bodies heavens heliometer Hipparchus History of Astronomy Huggins instruments JOHANNEs KEPLER John Herschel Jupiter Jupiter's Kepler Laplace Lick Observatory light line of apses line of sight lunar Mars mathematical mean distance measured ment Mercury meteor miles a second moon nebulae Newton º º observations Observatory orbit parallax period photographic physical planet planetary pole position predicted proper motion proved Ptolemy R. S. Phil records refractor retrograde retrograde motion revolving round ring rotation satellites Saturn seems showing Sir William Herschel Sirius solar eclipse solar system spectra spectroscope spectrum sphere spots stellar sun-spot supposed tables telescope theory tion Trans Tycho Brahe universal gravitation Uranus velocity Venus Verrier
Popular passages
Page 67 - 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 26 - So he sate and cunningly guided the craft with the helm, nor did sleep fall upon his eyelids, as he viewed the Pleiads and Bootes, that setteth late, and the Bear, which they likewise call the Wain, which turneth ever in one place, and keepeth watch upon Orion, and alone hath no part, in the baths of Ocean. This star, Calypso, the fair goddess, bade him to keep ever on the left as he traversed the deep.
Page 53 - The third, viz. that the squares of the periodic times are proportional to the cubes of the mean distances...
Page 79 - Wherefore if according to what we have already said it should return again about the year 1758, candid posterity will not refuse to acknowledge that this was first discovered by an Englishman.
Page 122 - ... They have not been regarded as so successful as his geometrical analysis of the observed phenomena. It is only just to add that he himself did not attach equal weight to them ; for in answer to objections urged by Lalande to his theory that the spots are depressions, Wilson wrote thus in 1783 : — ' Whether their first production and subsequent numberless changes depend upon the eructation of elastic vapours from below, or upon eddies or whirlpools commencing at the surface, or upon the dissolving...
Page 51 - He then said boldly that it was impossible that so good an observer as Tycho could be wrong by eight minutes* and added, " out of these eight minutes we will construct a new theory that will explain the motions of all the planets.
Bibliographic information
| Title | History of Astronomy Hist. of sci. series History of the sciences |
| Author | George Forbes |
| Publisher | Putnam, 1909 |
| Original from | the University of California |
| Digitized | 29 Nov 2007 |
| Length | 200 pages |
| Export Citation | BiBTeX EndNote RefMan |