Note 9 — Chapter V
Frances A. (Frances Alice) Welby translation
The author has endeavored on the plates to represent the aspect of the Earth in the starry sky of Mercury, Venus, and Mars; but in all representations of this kind the stars are necessarily made too large. By calculation the diameters of the Earth and Moon as seen from the planets, and their distances, are as follows:
Diameter of the Earth.Diameter of the Moon.Distance Earth-Moon.
Of Mercury (opposition)20″8″871″
Of Venus (opposition)64″17″1,928″
Of Mars (quadrature)15″4″464″
Of Jupiter (quadrature)3.5″0.1″105″
These aspects will be appreciated if we remember that the distance of the components of ε Lyre = 207″, that of Atlas in Pleione = 301″, and that of the stars Mizar and Alcor = 708″.