Expedition 51 crewmember Jack Fischer signs a commemorative book in a traditional ceremony.
Expedition 51 crewmember Fyodor Yurchikhin lays flowers at the site where Russian space icons are interred.
Expedition 51 crewmember Jack Fischer of NASA lays flowers at the site where Russian space icons are interred.
Expedition 51 crewmember Jack Fischer of NASA and his wife, Elizabeth, pose for pictures at Red Square in Moscow.
This image from the HiRISE instrument on NASA's Mars Reconnaissance Orbiter was acquired to take a closer look at a…
The Prandtl-M completes a successful research flight.
Test flights of the Prandtl-M have resumed. The airframe also is the basis for another aircraft that will collect weather…
A Prandtl-M aerodynamic model flies following an air launch from a remotely piloted Carbon Cub.
Dave Berger, right, and John Bodylski prepare the Prandtl-M for a test flight.
Expedition 50 Flight Engineer Thomas Pesquet of the European Space Agency (ESA) photographed brightly glowing auroras from his vantage point…
