History of Astronomy |
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Page ix
... known astronomers of to - day cannot be included among the records of the History of Astronomy . The writer regrets the necessity that thus arises of leaving without mention the names of many who are now making history in astronomical ...
... known astronomers of to - day cannot be included among the records of the History of Astronomy . The writer regrets the necessity that thus arises of leaving without mention the names of many who are now making history in astronomical ...
Page 5
... known to us mainly through the Greek historians , and for information about the Chinese we I 1 R. A. S. Monthly Notices , vol . x . , p . 65 . 2 R. S. E. Proc . , vol . x . , 1880 . rely upon the researches of travellers and ...
... known to us mainly through the Greek historians , and for information about the Chinese we I 1 R. A. S. Monthly Notices , vol . x . , p . 65 . 2 R. S. E. Proc . , vol . x . , 1880 . rely upon the researches of travellers and ...
Page 9
... known to have 365 days , and that 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 ...
... known to have 365 days , and that 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 ...
Page 10
... known to the Chaldæans as the Saros . It consists of 235 lunations , and in that time the pole of the moon's orbit revolves just once round the pole of the ecliptic , and for this reason the eclipses in one cycle are repeated with very ...
... known to the Chaldæans as the Saros . It consists of 235 lunations , and in that time the pole of the moon's orbit revolves just once round the pole of the ecliptic , and for this reason the eclipses in one cycle are repeated with very ...
Page 12
... known by the names which they bear to this day , and that the signs of the zodiac were used for determining the courses of the sun , moon , and of the five planets Mercury , Venus , Mars , Jupiter , and Saturn . We have records of ...
... known by the names which they bear to this day , and that the signs of the zodiac were used for determining the courses of the sun , moon , and of the five planets Mercury , Venus , Mars , Jupiter , and Saturn . We have records of ...
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Common terms and phrases
accurate observations Airy astro Astronomer Royal Astronomia Nova astronomical units attraction axis bright calculations Cape Cassini catalogue centre century comet compute Copernicus diameter discovered discovery earth eclipse epicycles equatoreal error excentric explain fact fixed stars Galileo Greenwich Halley heavenly bodies heavens heliometer Hipparchus Huggins hydrogen hypothesis instruments Johann Kepler John Herschel Jupiter Jupiter's Kepler Laplace Lick Observatory light line of apses line of sight lunar Mars mathematical mean distance mean motion measured Mercury meteor method miles a second moon moon's nebulæ Newton Observatory orbit parallax perihelion period photographic physical planet planetary pole position predicted proper motion proved Ptolemy R. S. Phil records refractor retrograde retrograde motion revolution revolve round ring rotation round the sun satellites seems showed Sirius solar system spectra spectroscope spectrum spots stellar sun-spots sun's surface supposed tables telescope theory tion Trans Tycho Brahe Uranus velocity Venus Verrier zenith