<p>During a six-and-a-half-hour spacewalk on August 30, NASA astronaut Sunita Williams finishes the installation of a new switching unit on the <a href="http://science.nationalgeographic.com/science/space/space-exploration/international-space-station-article/">International Space Station</a>. The original unit experienced setbacks last week when misaligned parts restricted its movement. (See <a href="http://science.nationalgeographic.com/science/photos/iss-gallery/">more space station pictures</a>.)</p><p>Astronauts also installed a camera on the space station's arm. After helping to construct the orbiter, so-called Canadarm2 is now being used to capture unpiloted spacecraft in orbit.</p><p><em>—Daniel Stone</em></p>

Touching the Sun

During a six-and-a-half-hour spacewalk on August 30, NASA astronaut Sunita Williams finishes the installation of a new switching unit on the International Space Station. The original unit experienced setbacks last week when misaligned parts restricted its movement. (See more space station pictures.)

Astronauts also installed a camera on the space station's arm. After helping to construct the orbiter, so-called Canadarm2 is now being used to capture unpiloted spacecraft in orbit.

—Daniel Stone

Photograph courtesy NASA

Space Pictures This Week: Spacewalks, Mars Rover, More

New pictures showcase NASA spacewalks, the Martian surface, the far-off heavens, and the stars above a Kansas field.

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