Must have been 1968, after seeing 2001 and hearing about Apollo 7; I rushed to the National Geographic magazines in a bookshelve and found the march 1964 issue, the front page as well as page 369, painting from Davis Meltzer.
"Daring Gemini astronaut floats weightless, a thistledown in the vastness of space."
"Opening the hatch of his spacecraft, the tethered explorer ventures out alone into the deadly void. Pack on thigh contains enough oxygen for a 20 minute sortie. Design of the pressure suit ensures that it will not balloon out in the vacuum of space, lest it impairs the man's mobility. To determine the problems repairmen might face in servicing manned space stations, Gemini pilots may eventually go outside their ship, as this astronaut is doing, and perform experimental tasks. The astronaut himself becomes a satellite traveling 17,500 miles an hour. But, without air resistance, he has no sensation of speed."
Of course, there are mistakes such as the spacewalker getting out from the left side hatch (commander's seat) or the suit being an earlier one not used for EVA's, but that painting definitely was inspiring!
Raoul
How one becomes enamoured with space