
This classic photograph of the Earth was taken on Dec. 7, 1972, by the crew of the final Apollo mission,…

Astronaut Josh Cassada holds a roll-out solar array as he rides the robotic arm during a spacewalk.

Astronaut Josh Cassada is attached to the Canadarm2 robotic arm during a spacewalk to install a roll-out solar array.

The International Space Station orbits above the southern Pacific Ocean.

Astronaut Frank Rubio is pictured during a spacewalk to install a roll-out solar array.

Astronaut Nicole Mann and Koichi Wakata are pictured at the robotics workstation that controls the Canadarm2 robotic arm.

Expedition 68 astronauts prepare to begin a spacewalk to install a roll-out solar array on the International Space Station’s Starboard-4…

Astronaut Josh Cassada is tethered to the International Space Station during a spacewalk to install a roll-out solar array.

A set of four CubeSats, two from Japan, and one each from Uganda and Zimbabwe, are released above Namibia.