Harrison "Jack" Schmitt (born 1935) is a Geologist, astronaut and senator. He received a Bachelor of Science degree in science from the California Institute of Technology in 1957 and a Doctorate of Philosophy in Geology from Harvard University in 1964
He was a member of the Apollo 17 mission in 1972 and thereby the first and only geologist to land on the moon. Harrison served as a United States Senator, representing New Mexico.