William k hartmann biography of barack obama

American planetary scientist (born )

William Kenneth Hartmann (born June 6, ) is an American 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 (Theia), creating both the Moon and the Earth's ° tilt.^[1]

Early life and education

Hartmann was born in Pennsylvania in ^[2] He was awarded a Bachelor of Science degree (B.S.) in physics from Pennsylvania State University, and both a Master of Science degree (M.S.) in geology and Doctor of Philosophy (PhD) in astronomy from the University of Arizona.

Career

Hartmann's 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 work on the Mars Global Surveyor imaging team. He is currently a senior scientist at the Planetary Science Institute.

He has long been one of America's leading space art william k hartmann biography of barack obama4 WUPI