The International Space Station

A picture of the International Space Station, photographed by a crew member on the space shuttle Discovery. Image from NASA.

On Sunday, the space shuttle Atlantis undocked from the International Space Station (ISS) to head back home – completing what will probably be its final mission. Atlantis will land back on Earth Wednesday.

Now that the ISS is almost completely finished, NASA only has two more shuttle missions to wrap up its share of construction. Check out the photo below – the Space Station weighs over 816,000 pounds and is about 98% complete in terms of living space.

To learn more, you can read here: http://www.msnbc.msn.com/id/37301258/ns/technology_and_science-space/