170821-N-ZI635-401 WASHINGTON (Aug. 21, 2017) Vice President Mike Pence watches the 2017 solar eclipse with students from Cornerstone Schools of Washington D.C. who spent the afternoon learning about heliophysics – the study of our sun – with former NASA astronaut Pam Melroy, NASA scientist Brad Bailey, and agency education specialist Evelina Felicite-Maurice, at the U.S. Naval Observatory in Washington. (U.S. Navy photo by Mass Communication Specialist 2nd Class George M. Bell/Released)