Frozen in Time – On June 29, 1965, NASA made history with the selection of the six men who comprised Astronaut Group 4. Unlike the first three classes of astronauts, these six men were not fighter pilots with thousands of hours of experience on the yoke. They were all scientists, each with certain skills believed to be beneficial as the American exploration of space continued.
Five of the six astronauts in that group are captured in this photo from 1966. On the front row, left to right, are F. Curtis Michel, a physicist who left the group in 1969 to return to teaching, having never flown in space; Harrison Schmitt, a geologist who as the lunar module pilot of Apollo 17 became the 12th man to walk on the Moon in December, 1972; and Joseph Kerwin, a physician and naval flight surgeon who spent 28 days aboard Skylab in 1973.
On the back row are Owen Garriott, a physicist who spent a total of 69 days in space on board Skylab and the space shuttle and is part of the first father-and-son pair to ever go into space, and Edward Gibson, who spent 84 days on board Skylab, returning to Earth in February 1974.
Missing from this picture is Duane Graveline, a physician and air force flight surgeon who left the group before this picture was taken and never went into space.