ISS024-E-014263 (11 Sept. 2010) — NASA astronaut Tracy Caldwell Dyson, Expedition 24 flight engineer, looks through a window in the Cupola of the International Space Station. A blue and white part of Earth and the blackness of space are visible through the windows. The image was a self-portrait using natural light.

Wikimedia Commons Picture of the Day for July 12, 2012.

Photo credit: ‘Tracy Caldwell Dyson in Cupola ISS’ by NASA/Tracy Caldwell Dyson [Public domain], via Wikimedia Commons.