History of Astronomy |
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Page 61
But Laplace ' s calculations showed the new value to depend upon the
excentricity of the earth ' s orbit , which , according to theory , has a periodical
variation of enormous period , and has been continually diminishing for
thousands of years .
But Laplace ' s calculations showed the new value to depend upon the
excentricity of the earth ' s orbit , which , according to theory , has a periodical
variation of enormous period , and has been continually diminishing for
thousands of years .
Page 64
When Halley ' s comet reappeared in 1835 , Pontecoulant ' s computations for the
date of perihelion passage were very exact , and afterwards he showed that , with
more exact values of the masses of Jupiter and Saturn , his prediction was ...
When Halley ' s comet reappeared in 1835 , Pontecoulant ' s computations for the
date of perihelion passage were very exact , and afterwards he showed that , with
more exact values of the masses of Jupiter and Saturn , his prediction was ...
Page 100
Howlett , however , in 1894 , after thirty years of work , showed that the spots are
not always depressions , being very subject to disturbance . The Kew
photographs ' contributed a vast amount of information about sun - spots , and
they showed ...
Howlett , however , in 1894 , after thirty years of work , showed that the spots are
not always depressions , being very subject to disturbance . The Kew
photographs ' contributed a vast amount of information about sun - spots , and
they showed ...
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Contents
Ancient GREEK ASTRONOMY | 3 |
INSTRUMENTS OF PRECISIONSIZE OF THE SOLAR | 10 |
GALILEO AND THE TELESCOPENOTIONS OF GRAVITY | 46 |
5 other sections not shown
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Common terms and phrases
accepted accurate ancient appear astronomers attraction bodies born bright calculations called catalogue cause centre century circle comet compared complete Copernicus determined diameter direction discovered discovery distance earth eclipse effect enabled epicycles equal error excentric explain fact fixed follow force Galileo give given gravitation heavenly heavens held Herschel Hipparchus idea included interesting invented Jupiter Kepler knowledge known later light lunar Mars mass mathematical mean measured method miles minutes moon moon's motion move Newton noticed object observations Observatory opposition orbit original parallax pass period photographic physical planetary planets pole position predicted present principle progress proper proved records revolve rotation round Royal satellites says seems seen showed solar system spectroscope spectrum stars studied sun's supported supposed surface tables telescope theory tion trace true Tycho Brahe uniform universal
Bibliographic information
| Title | History of Astronomy Hist. of sci. series History of science series |
| Author | George Forbes |
| Publisher | Watts, 1909 |
| Original from | the University of California |
| Digitized | 13 Jan 2011 |
| Length | 154 pages |
| Export Citation | BiBTeX EndNote RefMan |