Two views of Ven as photographed by Mariner 10 robotic probe during a flyby while en-route to Mars; and four further images of Ven by Galileo imaging systems Mariner 10, 6-9 February 1974/ Galileo, February 1990 Two vintage gelatin silver prints on fibre-based paper, 20.5 x 25.3 cm (8 x 10 in), with NASA HQ captions on the verso, numbered P-14400 and P-14368; and four gelatin silver prints on resin-coated paper, with THIS PAPER MANUFACTURED BY KODAK and NASA JPL captions on the verso, numbered P-37212, P-37214, P-37215, P-37217