Matches in DBpedia 2014 for { ?s ?p William Kenneth Hartmann is a noted planetary scientist, author, and writer. He was the first to convince the scientific mainstream that the Earth had once been hit by a planet sized body (Theia), creating both the moon and the Earth's 23.5° tilt.Born in Pennsylvania in 1939, he received his B.S. in physics from Pennsylvania State University, and an M.S. in geology and PhD in astronomy from the University of Arizona.. }
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- William_Kenneth_Hartmann comment "William Kenneth Hartmann is a noted planetary scientist, author, and writer. He was the first to convince the scientific mainstream that the Earth had once been hit by a planet sized body (Theia), creating both the moon and the Earth's 23.5° tilt.Born in Pennsylvania in 1939, he received his B.S. in physics from Pennsylvania State University, and an M.S. in geology and PhD in astronomy from the University of Arizona.".