Watch It Live: Discovery Departure Coming Up

Shuttle Discovery is scheduled to depart the International Space Station at 3:53 p.m., capping a highly successful mission to complete the outpost's central truss and deliver and deploy a fourth and final set of American solar wings.

You can watch the undocking and a subsequent flyaround of the station right here in The Flame Trench. Simply click the NASA TV box at the righthand side of the page to launch our NASA TV viewer and live coverage. Be sure to refresh this page, too, for periodic updates.

The flyaround is expected to be a visual spectacular. With shuttle pilot Tony Antonelli at the controls, Discovery will spring free from the docking port at the U.S. Harmony module and back to a point 400 feet away from the station.

Then Antonelli will fly around the station as crewmates Steve Swanson, Sandy Magnus and Ricky Arnold shoot video and still imagery out the shuttle's cockpit and overhead windows. It will be the first opportunity to see the station as it has appeared in artist concepts for years -- that is, with all four of its glimmering gold solar wings installed and fully unfurled.

You can also check out this photo recap of the STS-119 mission and in particular, the three spacewalks performed by Swanson, Arnold and Discovery mission specialist Joe Acaba, a former Melbourne High School science teacher.

Working in two-man teams, the astronauts tallied 19 hours and four minutes of spacewalking work outside the International Space Station.

They were the 121st, 122nd and 123rd spacewalks performed during the assembly and maintenance of the station. Astronauts and cosmonauts now have accumulated 775 hours of spacewalking work since the first two building blocks of the outpost were linked in low Earth orbit in late 1998.

You can also click to enlarge and save each in this series of 10 NASA images distributed by the Associated Press. Then click the enlarged images to get even bigger views. They all show the astronauts working outside the station.

Arnold is the astronaut wearing the all-white spacesuit. Acaba is the astronaut wearing the spacesuit with broken red stripes on its legs, and Swanson is the astronaut wearing the spacesuit with solid red stripes.