Following the 1962 summer study, the drive to recruit scientists into the astronaut programme began to gather pace. In a letter dated 16 October 1962 from NASA's Deputy Administrator Hugh Dryden to Evan H. Walker of the University of Maryland, it was stated that the subject of scientists making flights to the Moon to carry out
their own research, as well as participating in the scientific objectives of the Apollo programme, "has been under careful study by a NASA committee."8 The letter also stated that, following the recommendation for a broad programme of scientific research and the direct participation of scientists in surface explorations, NASA was working towards obtaining the maximum scientific return possible from the Apollo missions. Dr. Eugene M. Shoemaker was brought into NASA in order to coordinate the planning of scientific research, including that of the manned lunar programme. Shoemaker, a geologist from the US Geological Survey, was also helping pilot-astronauts at MSC to prepare for Apollo missions to the Moon by training them in geology.
More than anyone else, Shoemaker left an indelible mark on planetary science before his tragic death in an automobile accident in the Australian outback in 1997. As his friend Jack Sevier put it, Shoemaker "was in it at the beginning when it was the domain of astronomers with their techniques of photogeology, geologic mapping, cratering analyses, and all the rest of the things that he helped to invent."9 In 1961, Shoemaker created (and became the first Chief Scientist of) the USGS Astrogeology Research Program, which produced detailed maps of the ancient lunar surface. He secretly harboured a dream of becoming an astronaut himself one day and flying to the Moon to investigate the lunar terrain firsthand.
Early in 1963, NASA created a Manned Space Science Planning Group and a Panel On In-flight Scientific Experiments (which became known as POISE), replacing the ad hoc Committee on Scientific Tasks and Training for Man-In-Space. The new groups were formed to create closer ties between the astronaut office, MSC, the field centres, and the Office of Space Sciences at NASA HQ in Washington. This would ensure that the proposed experiments assigned to the Gemini programme would be managed more efficiently than those flown on Mercury.10
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