Who: Dr. R. Aileen Yingst, planetary geologist and Director of NASA's Wisconsin Space Grant Consortium What: Live chat about Mars / the Moon / Jupiter's moons Date: Wednesday, Sept. 29, 2004 Time: 7:30 - 8:30 AM Alaska Time 8:30 - 9:30 AM Pacific Time 9:30 - 10:30 AM Mountain Time 10:30 - 11:30 AM Central Time 11:30 AM - 12:30 PM Eastern Time

Biography: Dr. R. Aileen Yingst has served on the Galileo mission to Jupiter and its moons and worked closely with the Clementine lunar reconnaissance team. She spent two years with the Mars Atmospheric and Geologic Imaging Team at the University of Arizona, working as a geologist on the Mars Pathfinder and Mars Polar Lander missions. Dr. Yingst now serves as Director of the Wisconsin Space Grant Consortium at the University of Wisconsin - Green Bay, where she continues her research in the surface composition of Mars and the interior workings of the Moon.