Archivo: Cassini apparent

Descripción: Representation of the apparent motion of the Sun, Mercury, and Venus from the earth. Taken from the "Astronomy" article in the first edition of wikipedia:Encyclopædia Britannica (1771). This geocentric diagram shows, from the location of the earth, the sun's apparent annual orbit, the orbit of Mercury for 7 years, and the orbit of Venus for 8 years, after which Venus returns to almost the same apparent position in relation to the earth and sun.
Título: Cassini apparent
Créditos: Encyclopaedia Britannica (1st Edition, 1771; facsimile reprint 1971), Volume 1, Fig. 2 of Plate XL facing page 449.
Autor(a): James Ferguson (1710-1776), based on similar diagrams by Giovanni Cassini (1625-1712) and Dr Roger Long (1680-1770); engraved for the Encyclopaedia by Andrew Bell.
Términos de Uso: Dominio Público
Licencia: Dominio Público
¿Se exige la atribución?: No