Keywords: Cassini apparent.jpg en Representation of the apparent motion of the sun and planets from the earth Taken from the Astronomy article in the first edition of wikipedia Encyclopædia Britannica 1777 It shows the movement of Mercury's orbit for 7 years and Venus for 8 in which time the path of Venus returns to almost the same apparent position Encyclopaedia Brittanica 1st Edition Dr Long's copy of Cassini 1777 PD-old-100 Ancient Greece History of astronomy epicycle Images from Encyclopædia Britannica |