This illustration shows NASA's Cassini spacecraft about to make one of its dives between Saturn and its innermost rings as…
Expedition 51 crewmember Jack Fischer of NASA displays a medal derived from the Apollo-Soyuz crew patch.
Expedition 51 crewmember Fyodor Yurchikhin of the Russian Federal Space Agency (Roscosmos, right) answers a reporter's question.
Expedition 51 crewmember Fyodor Yurchikhin signs a commemorative book in a traditional ceremony.
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.
