History of Astronomy |
From inside the book
Results 1-5 of 12
Page
... epicycle), whose centrerevolves round the earth ontheprimary circle (the deferent), atauniform rate round the excentric. Ptolemy supposed the centres of the epicycles of Mercuryand Venusto be ona ... epicycles of Mars, Jupiter, and Saturn.
... epicycle), whose centrerevolves round the earth ontheprimary circle (the deferent), atauniform rate round the excentric. Ptolemy supposed the centres of the epicycles of Mercuryand Venusto be ona ... epicycles of Mars, Jupiter, and Saturn.
Page
... epicycles in their own periodic timesand in the deferentround the earthin a year. The majorplanets were supposed to revolve in the deferent round theearth intheir own periodic times, andin their epicycles oncein a year. It did not occur ...
... epicycles in their own periodic timesand in the deferentround the earthin a year. The majorplanets were supposed to revolve in the deferent round theearth intheir own periodic times, andin their epicycles oncein a year. It did not occur ...
Page
... epicycle,[2] the distance of the excentric[3] from the centre of the deferent, andthe position oftheline of apses,[4] besides the inclinationand position ofthe plane of the planet's orbit.The only object ever aimed at ... EPICYCLES—FROM ...
... epicycle,[2] the distance of the excentric[3] from the centre of the deferent, andthe position oftheline of apses,[4] besides the inclinationand position ofthe plane of the planet's orbit.The only object ever aimed at ... EPICYCLES—FROM ...
Page
... epicycles for explaining retrograde motion,as thePtolemaic theory did.Furthermore, either systemcould use ... epicycle forthispurpose, or that he could useboth an excentric andanepicycle foreach planet,and so bring theory ...
... epicycles for explaining retrograde motion,as thePtolemaic theory did.Furthermore, either systemcould use ... epicycle forthispurpose, or that he could useboth an excentric andanepicycle foreach planet,and so bring theory ...
Page
... , and the lines of apses do not pass through to the sun. Such wasthe theory advanced by Copernicus: The earth moves inan epicycle, onadeferent whose centre isalittle distance from the sun. The planets move in a similar.
... , and the lines of apses do not pass through to the sun. Such wasthe theory advanced by Copernicus: The earth moves inan epicycle, onadeferent whose centre isalittle distance from the sun. The planets move in a similar.
Other editions - View all
Common terms and phrases
Airy allthe andthat andthe asthe Astronomer Royal Astronomia Nova astronomical units atmosphere atthe attraction axis bright bythe calculations catalogue centre century Chaldĉans Chinese comet confirmed Copernicus detected diameter discovered discovery distance earth eclipse epicycles equatoreal excentric explain fixed stars FOOTNOTES Frauenhofer fromthe Galileo Greenwich Halley havebeen heavenly bodies heavens heliometer Herschel Hipparchus Huggins hydrogen hypotheses inequality instruments inthe isthe John Herschel Jupiter Jupiter's Kepler lawof Lick Observatory light lines lunar Mars mathematical mean motion measured Mercury meteor miles moon moon's nebula Newton ofthese onthe orbit parallax perihelion period photographic physical planet planetary position predicted proper motion Ptolemy records reflector refractor retrograde retrograde motion revolve rotation round satellites Saturn seems solar system spectra spectroscope spectrum spots stellar sun's sunspot supposed surface telescope terrestrial thatthe theearth themoon theory thesame thesolar thesun tobe tothe Tycho Brahe Uranus velocity Venus Verrier William Herschel withthe zenith