Albedo maps of the Galilean satellites. Lyot examined these satellites with the 38 cm refractor in 1941, later with the 60-cm telescope. Markings confirmed by Camichel and Gentili. Source: A. Dollfus: Visual and photographic studies off planets at the Pic du Midi. In: Planets and Satellites, GP Kuiper and B Middlehurst, eds. Chicago Univ Press […]