History of Astronomy |
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Page 107
... Cassini made a chart of the full moon . Since then we have the charts of Schröter , Beer and Mädler ' Langrenus ( van Langren ) , F. Selenographia sive lumina austriae philippica ; Bruxelles , 1645 . ( 1837 ) , and of Schmidt , of ...
... Cassini made a chart of the full moon . Since then we have the charts of Schröter , Beer and Mädler ' Langrenus ( van Langren ) , F. Selenographia sive lumina austriae philippica ; Bruxelles , 1645 . ( 1837 ) , and of Schmidt , of ...
Page 109
... be a bar to the discovery of markings by which the axis and period of rotation could be fixed . Cassini gave the rotation as twenty - three hours , by observing a bright spot on her surface . Shröter made it 23h . THE PHYSICAL PERIOD 109.
... be a bar to the discovery of markings by which the axis and period of rotation could be fixed . Cassini gave the rotation as twenty - three hours , by observing a bright spot on her surface . Shröter made it 23h . THE PHYSICAL PERIOD 109.
Page 114
... Cassini , with a fine telescope , 35 - feet focal length , observed many spots moving from east to west , whence he concluded that Jupiter rotates on an axis like the earth . He watched an unusually permanent spot during twenty - nine ...
... Cassini , with a fine telescope , 35 - feet focal length , observed many spots moving from east to west , whence he concluded that Jupiter rotates on an axis like the earth . He watched an unusually permanent spot during twenty - nine ...
Page 115
... Cassini's famous spot . The " great red spot was first observed by Niesten , Pritchett , and Tempel , in 1878 , as a rosy cloud attached to a whitish zone beneath the dark southern equatorial band , shaped like the new war balloons ...
... Cassini's famous spot . The " great red spot was first observed by Niesten , Pritchett , and Tempel , in 1878 , as a rosy cloud attached to a whitish zone beneath the dark southern equatorial band , shaped like the new war balloons ...
Page 116
... Cassini , who detected bands like Jupiter's belts . Herschel established the rotation of the planet in 1775–94 . From observations during one hundred rotations he found the period to be Ioh . 16m . os . , 44. Herschel also measured the ...
... Cassini , who detected bands like Jupiter's belts . Herschel established the rotation of the planet in 1775–94 . From observations during one hundred rotations he found the period to be Ioh . 16m . os . , 44. Herschel also measured the ...
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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