Ask an Expert

Text Size

Chat Bios: Dr. Barbara Cohen, Dr. Greg Chavers
More About Chat Expert Dr. Barbara Cohen

Dr. Barbara Cohen is a planetary scientist at NASA's Marshall Space Flight Center. She supports NASA in various roles for the next phase of lunar planning, both human and robotic. Barbara's science interests focus on geochronology and geochemistry of planetary samples from the Moon, Mars and asteroids. In pursuit of these interests, Barbara works on the Mars Exploration Rovers Spirit and Opportunity and is currently building a next-generation planetary noble gas laboratory for continued geochronology studies.

Dr. Cohen earned a bachelor's degree in geology from the State University of New York at Stony Brook in 1993. She earned a Doctorate in Planetary Sciences from the University of Arizona in 2000.

More About Chat Expert Dr. Greg Chavers

Dr. Greg Chavers is a lead systems engineer for the Robotic Lander Project at NASA's Marshall Space Flight Center. He serves as lead for technical development of the robotic lander prototype, as well as developing lander mission concepts and designs to be able to land a craft on an airless body such as Earth's moon or Europa, Jupiter's moon. He has worked at the Marshall Center for 20 years on Programs such as the Chandra X-ray Observatory where he served as test engineer and test conductor -- calibrating the instruments for the telescope. He also conducted advanced propulsion research in the Propulsion Research Laboratory and collaborated internationally on high-powered advanced plasma propulsion.

Dr. Chavers earned a bachelor's degree in Aerospace Engineering from Auburn University in 1990. He earned a Master's degree in physics in 1998 and a Doctorate in Physics in 2003, both from the University of Alabama in Huntsville.
Kim Newton, 256-544-0371
Marshall Space Flight Center, Huntsville, Ala.