(L-R) Space Telescope Science Institute astronomer Nikole Lewis, MIT Professor of planetary science and physics Sara Seager, Sean Carey of NASA's Spitzer Science Center, University of Liege (Belgium) astronomer Michael Gillon and Associate Administrator for NASA's Science Mission Directorate Thomas Zurbuchen attend a news conference moderated by NASA Public Affairs Officer Felicia Chou, to present new findings on exoplanets, planets that orbit stars other than Earth's sun, in Washington, U.S., February 22, 2017. REUTERS/Mike Theiler