History of Astronomy |
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Page 18
Eratosthenes ( 276 – 196 B . C . ) measured the inclination to the equator of the
sun ' s apparent path in the heavens — i . e . , he measured the obliquity of the
ecliptic , making it 23° 51 ' , confirming our knowledge of its continuous
diminution ...
Eratosthenes ( 276 – 196 B . C . ) measured the inclination to the equator of the
sun ' s apparent path in the heavens — i . e . , he measured the obliquity of the
ecliptic , making it 23° 51 ' , confirming our knowledge of its continuous
diminution ...
Page 75
With these he measured the positions of stars , or the distance of a comet from
scveral known stars . He has left us full descriptions of them , illustrated by
excellent engravings . Previous to his time such instruments were made of wood .
With these he measured the positions of stars , or the distance of a comet from
scveral known stars . He has left us full descriptions of them , illustrated by
excellent engravings . Previous to his time such instruments were made of wood .
Page 84
The superiority of the heliometer over all other devices ( except photography ) for
measuring small angles has been ... A measurement of the distance of any planet
fixes the scale , and , as Venus approaches the earth most nearly of all the ...
The superiority of the heliometer over all other devices ( except photography ) for
measuring small angles has been ... A measurement of the distance of any planet
fixes the scale , and , as Venus approaches the earth most nearly of all the ...
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Contents
ANCIENT GREEK ASTRONOMY | 3 |
GALILEO AND THE TELESCOPENOTIONS OF GRAVITY | 46 |
NEWTONS SUCCESSORS HALLEY EULER | 60 |
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Common terms and phrases
accepted accurate ancient appear astronomers attraction bodies bright calculations called catalogue cause centre century Chinese circle comet compared complete Copernicus determined diameter direction discovered discovery distance earth eclipse effect elements enabled epicycles equal error explain fact fixed follow force four Galileo gave give given gravitation heavens held Herschel increased interesting Jupiter Kepler knowledge known later light lunar Mars mass mathematical mean measured method miles moon moon's motion move nebulæ Newton noted noticed object observations Observatory opposition orbit original parallax pass period photographic physical planet planetary pole position predicted progress proper motion proved records researches revolve ring rotation round Royal satellites seems seen showed solar system spectroscope spectrum stars studied sun's supposed surface tables telescope theory tion trace true Tycho Brahe UNIVERSITY
Bibliographic information
| Title | History of Astronomy The history of science series |
| Author | George Forbes |
| Publisher | Watts, 1921 |
| Original from | Indiana University |
| Digitized | 5 Aug 2010 |
| Length | 150 pages |
| Export Citation | BiBTeX EndNote RefMan |