William Kenneth Hartmann - Wikiwand

William Kenneth Hartmann is a noted planetary scientist, artist, author, and writer. He was the first to convince the scientific mainstream that the Earth had once been hit by a planet sized body , creating both the Moon and the Earth

William K Hartmann: 'First on Mars', November 1993 : r/sciencefiction

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Pratisaṃvid – © Dorji Wangchuk (Kuliśeśvara)

Planetary Science Institute founder William K. Hartmann named 2010

Tom Courtenay - Wikiwand

William K Hartmann: 'First on Mars', November 1993 : r/sciencefiction

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20th century Art Archives - Page 2 of 4 - Teacher Curator

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William Kenneth Hartmann - Wikiwand

2010 Barringer Medal for William K. Hartmann - Chapman - 2010