Jeffrey Newmark, interim director of Heliophysics at NASA Headquarters, center, speaks during a panel discussion at the "Solar System and Beyond: NASA's Search for Water and Habitable Planets" event on Tuesday, April 7, 2015 at NASA Headquarters in Washington, DC. Newmark, along with John Grunsfeld, associate administrator for the Science Mission Directorate at NASA Headquarters, James Green, director of Planetary Science at NASA Headquarters, Paul Hertz, director of Astrophysics at NASA Headquarters, and Ellen Stofan, NASA chief scientist, discussed the recent discoveries of water a

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Keywords: dc, ellen, green, grunsfeld, headquarters, hertz, james, jeffrey, joel, john, kowsky, nasa, newmark, paul, solar, stofan, system, usa, washington