
Fabrication is underway on liquid oxygen, liquid hydrogen and related piping for RS-25 engine testing on the A-1 Test Stand…

A model of the Lunar Atmosphere and Dust Environment Explorer (LADEE) spacecraft is seen in the foreground during a LADEE…

Russian cosmonaut Alexander Misurkin conducts a spacewalk.

Russian cosmonaut Alexander Misurkin conducts a spacewalk.

Russian cosmonaut Alexander Misurkin conducts a spacewalk.

Russian cosmonaut Alexander Misurkin conducts a spacewalk.

European Space Agency astronaut Luca Parmitano enters data on a computer in the Destiny laboratory.

European Space Agency astronaut Luca Parmitano wears communication headgear.

The Japanese “Kounotori” H2 Transfer Vehicle-4 is currently attached to the Earth-facing port of the International Space Station’s Harmony node.

Russian cosmonaut Alexander Misurkin conducts a spacewalk.