Space Science And Astrobiology (ST) Main Menu BarHomeOverviewAstrophysicsPlanetary SystemsExobiologyWho We AreWhat We DoHow We Work Planetary Systems Branch (STT) Luke Sollitt Branch Chief, Planetary Systems Amanda Brecht Deputy Branch Chief/Research Scientist Sandra Owen Assistant Branch Chief Andrew M. Annex Planetary Scientist Courtney M.L. Batterson Associate Research Scientist Ross Beyer Research Scientist Jennifer Blank Nathalie Cabrol Researcher Doug Caldwell Carrie Chavez Research Assistant Anthony Colaprete Principal investigator on the LCROSS mission Jeff Cuzzi Principal Investigator Ariel N. Deutsch Planetary Scientist Rick Elphic Planetary Scientist Paul Estrada Richard Freedman Ehsan (Sam) Gharib-Nezhad Data Scientist Uma Gorti Jennifer Heldmann Research Scientist Jeff Hollingsworth Planetary Scientist Mera Horne Mechanical Engineer Peter Jenniskens Research Scientist Vandana Jha Space Scientist Melinda Kahre Space Scientist, Lead of the Mars Climate Modeling Center Michael Kaufman Alexandre Kling Research Scientist Darlene Lim Research Scientist Jack Lissauer Staff Scientist Andrew Mattioda Research Scientist Chris McKay Sr. Scientist Zara Mirmalek Social Scientist, Work Ethnographer Jeff Moore Scientist Eldar Noe Dobrea Daniel Olson Lynn J. Rothschild Sr Research Scientist, Bio and Bio-Inspired Technologies, Research and Technology Lead for NASA HQ STMD Derek Sears Karina Shain Administrative Assistant Heather Smith Kathryn Steakley Planetary Scientist Carol Stoker Research Scientist Orkan Umurhan Research Scientist Richard Urata Research Scientist Kimberley Warren-Rhodes Research scientist Oliver White Research Scientist Mary Beth Wilhelm Research Scientist John Wilson Space Scientist Diane H. Wooden Scientist Kevin Zahnle Scientist Aaron Zent Scientist