Aerial view of NASA's Goddard Space Flight Center in Greenbelt, Maryland, in 2010. Credits: NASA Goddard/Bill Hrybyk

Aerial view of NASA's Goddard Space Flight Center in Greenbelt, Maryland, in 2010. Credits: NASA Goddard/Bill Hrybyk

Aerial view of NASA's Goddard Space Flight Center in Greenbelt, Maryland, in 2010. Credits: NASA Goddard/Bill Hrybyk

Aerial view of NASA's Goddard Space Flight Center in Greenbelt, Maryland, in 2010. Credits: NASA Goddard/Bill Hrybyk

Aerial view of NASA's Goddard Space Flight Center in Greenbelt, Maryland, in 2010. Credits: NASA Goddard/Bill Hrybyk

Aerial view of NASA's Goddard Space Flight Center in Greenbelt, Maryland, in 2010. Credits: NASA Goddard/Bill Hrybyk

Aerial view of NASA's Goddard Space Flight Center in Greenbelt, Maryland, in 2010. Credits: NASA Goddard/Bill Hrybyk

Aerial view of NASA's Goddard Space Flight Center in Greenbelt, Maryland, in 2010. Credits: NASA Goddard/Bill Hrybyk