William k hartmann biography of rory and ryan

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, creating both the moon and the Earth's Born in Pennsylvania in , he received his B. His career spans over 40 years, from work in the early s with Gerard Kuiper on Mare Orientale, and work on the Mariner 9 Mars mapping project, to current work on the Mars Global Surveyor imaging team.

He is currently a senior scientist at the Planetary Science Institute.

We present the first science results achieved by OSIRIS from the arrival at the comet throughout the mapping phase.

Strongly influenced by Chesley Bonestell, he has long been one of America's leading space artists, and has written and illustrated, often collaboratively with artist Ron Miller, numerous books on the history of Earth and the Solar System. His written work also includes textbooks, short fiction, and novels, the most recent being published in We're doing our best to make sure our content is useful, accurate and safe.

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William K. Hartmann, Alessandro Morbidelli Meteoritics & Planetary ScienceVersion of Record online: 18 December LINK “Impact rates in the first Myr.

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