From the moon to Mars.
Schmitt
Harrison H
HH
University of Wisconsin-Madison, USA.
D018480:Astronauts; D005844:Geology; D018535:Mars; D016081:Moon; D013026:Space Flight / Q000191:economics / Q000379:methods / Q000639:trends; D019442:Space Suits; D018531:Spacecraft; D014481:United States; D018557:United States National Aeronautics and Space Administration