NASA Public Affairs Officer Felicia Chou, right, moderates a TRAPPIST-1 planets briefing with presenters, from left, Astronomer at the Space Telescope Science Institute in Baltimore Nikole Lewis, Professor of planetary science and physics at Massachusetts Institute of Technology, Cambridge, Sara Seager, Manager of NASA's Spitzer Science Center at Caltech/IPAC, Pasadena, California Sean Carey, University of Liege in Belgium Astronomer Michael Gillon, and NASA Associate Administrator of the Science Mission Directorate Thomas Zurbuchen, Wednesday, Feb. 22, 2017 at NASA Headquarters in Washington.

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NASA Public Affairs Officer Felicia Chou, right, moderates a TRAPPIST-1 planets briefing with presenters, from left, Astronomer at the Space Telescope Science Institute in Baltimore Nikole Lewis, Professor of planetary science and physics at Massachusetts Institute of Technology, Cambridge, Sara Seager, Manager of NASA's Spitzer Science Center at Caltech/IPAC, Pasadena, California Sean Carey, University of Liege in Belgium Astronomer Michael Gillon, and NASA Associate Administrator of the Science Mission Directorate Thomas Zurbuchen, Wednesday, Feb. 22, 2017 at NASA Headquarters in Washington. Researchers revealed the first known system of seven Earth-size planets around a single star called TRAPPIST-1. Photo Credit: (NASA/Bill Ingalls) More: ( )

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