International Planetary Scientists Converge on Pitt for Symposium Today and Tomorrow Event honors retired Pitt researcher Bruce Hapke, whose once-ignored space weathering theory was vindicated 25 years later, in 2000
September 20, 2002
PITTSBURGH—Scientists from the remotest parts of the planet will converge on Pittsburgh for the two-day "Solar System Remote Sensing Symposium," beginning today in the University of Pittsburgh's University Club, 123 University Place, in Oakland.
Cosponsored by Pitt, the Lunar and Planetary Institute, NASA, and the Spectroscopy Society of Pittsburgh, the event will honor Pitt Emeritus Professor of Geology and Planetary Science Bruce Hapke, whose theory of space weathering—at first ignored by the scientific community when he presented it in 1975—was finally accepted in 2000, 25 years later.
"The subject of space weathering interests planetary scientists who use remote sensing because it causes major changes in the optical properties of the surfaces," says Hapke. "Space weathering is the cumulative effect of the physical and chemical changes on material exposed on an airless body."
Academic, government, and private industry researchers from the United States, Russia, Ukraine, Finland, Japan, Italy, and France will present papers in what appears to be an international "Who's Who" of planetary scientists. According to Pitt Emeritus Professor of Geology and Planetary Science William Cassidy, a long-time colleague of Hapke, many of the papers being presented reflect Hapke's work.
"Bruce was a member of the first group of scientists to receive lunar samples during those exciting times when the world was transfixed by the images of astronauts standing on the moon," Cassidy says. "Studying these samples over a period of years, Bruce and his students unraveled the natural processes that cause the lunar surface to become darker over time, and, from an understanding of these processes, predicted the physical state of the surfaces of grains exposed on the surface of the moon.
"These principles have now been found to apply to all airless bodies in the solar system. The general process, called space weathering, affects our interpretation of remote sensing observations of the surfaces of Mercury and the asteroids," Cassidy adds.
The symposium was organized by Cassidy and a committee composed of Deborah Domingue, Applied Physics Laboratory, Johns Hopkins University; Robert M. Nelson, Jet Propulsion Laboratory; Carle Pieters, professor in the Department of Geological Sciences at Brown University; Yurij Shkuratov, Kharkov Astronomical Observatory in Ukraine; Ann Sprague, senior research associate, lunar and planetary laboratory at the University of Arizona; Joseph Veverka, professor and chair of the Department of Astronomy at Cornell University; Faith Vilas, a planetary astronomy scientist at NASA Headquarters; and Robert Witkowski, a volunteer at the University of Pittsburgh.
A list of participating institutions follows.
Finland
The University of Helsinki
France
Institut d'Astrophysique Spatiale
Laboratoire de Planétologie de Grenoble
Observatoire Midi-Pyrénées
Italy
INAF – Osservatorio Astronomico di Torino
IRA – CNR
Japan
Kobe University
Nishimatsu Construction Co.
Osaka University
The University of Tokyo
Russia
IRE RAS
Space Research Institute, Moscow
Ukraine
Kharkov Astronomical Observatory
United States
Government
Jet Propulsion Laboratory, at California Institute of Technology
NASA Ames Research Center, Moffett Field, Cal.
NASA Goddard Space Flight Center, Greenbelt, Md.
NASA Johnson Space Center, Houston, Tex.
Academic
University of Arizona, Lunar and Planetary Laboratory
Arizona State University
Bloomsburg University Department of Geography and Geosciences
Brown University Department of Geological Sciences
University of Colorado, Boulder
Cornell University Center for Radiophysics and Space Research
Grays Harbor College, Aberdeen, Wash.
Hawaii Institute of Geophysics and Planetology, University of Hawaii at Manoa
Hawaii Institute of Geophysics and Planetology, University of Hawaii at Honolulu
Ithaca College
Johns Hopkins University
Northwestern University
University of Tennessee Planetary Geosciences Institute
University of Virginia
Wellesley College
Washington University, McDonnell Center for the Space Sciences
Private
Applied Physics Laboratory, Laurel, Md.
Applied Coherent Technology, Herndon, Va.
L3 Com Analytics Corporation, of Vienna, Va.
Science Applications International Corporation, Chantilly, Va.
Southwest Research Institute, Boulder, Co.
Space Science Institute, Boulder, Co.
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9/20/02/tmw
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