William K. Hartmann is known internationally as a planetary astronomer, writer, and painter. He is a Senior Scientist at the Planetary Science Institute in Tucson, Arizona. His research has involved the origin and evolution of planets and studies of the surfaces of Mars, the moon, asteroids, and comets. Asteroid 3341 is named after him in recognition of this work, and in 1998 he was named first recipient of the Carl Sagan medal of the American Astronomical Society for communicating planetary science to the public. In 2002 he was awarded a medal from the European Geophysical Society for his work on planetary cratering. He has authored three other astronomy books for Thomson, Brooks-Cole, several popular astronomy books, and two novels, MARS UNDERGROUND and CITIES OF GOLD.