Science and Health

Astronauts celebrate new 'window on the world'

(China Daily)
Updated: 2010-02-18 09:06

CAPE CANAVERAL, Florida: In a highly anticipated grand finale to their mission, astronauts opened the shutters on the International Space Station's new observation deck Wednesday and were humbled by "absolutely spectacular" views of Earth from inside the elaborate atrium of windows.

Astronauts celebrate new 'window on the world'

Best seat in the house With the Earth's horizon and the darkness of space serving as a background, a portion of the International Space Station appears in this image provided by NASA, which was taken by a crew member on the International Space Station. The space shuttle Endeavour docked there last week. [Agencies]

The $27 million lookout opened each of its seven eyes one window at a time as the crews of the station and shuttle Endeavour carried out their third and final spacewalk.

It was the moment everyone had been waiting for: The round central window - the largest ever flown in space - was the first exposed as astronauts inside cranked open the shutter as they sailed 350 kilometers above the South Pacific.

"As expected, the view through window seven is absolutely spectacular," space station commander Jeffrey Williams said. "When we have the others around it open, it will give us a view of the entire globe. Absolutely incredible."

Mission Control set the night's mood by beaming up a recording of Jimmy Buffett's Window on the World.

It was a satisfying conclusion to this construction mission for the 11 astronauts. Though Nicholas Patrick and Robert Behnken completed a multitude of other chores during Tuesday night's spacewalk, including opening valves on an ammonia coolant line they previously installed on Tranquility, a new room that the astronauts connected to the space station last Friday.

Mission Control wanted the shutters opened while the spacewalkers were still floating outside so the two men could intercede if something jammed. Behnken and Patrick stayed a safe 10 feet or more from the windows while the shutters were raised. The last thing NASA wanted was to have one of them inadvertently kick a window or bang it with a tool bag.

The observation deck is part of Tranquility, a more than $380 million addition. Space shuttle Endeavour delivered the European compartments last week.

The Italian-built dome - 1.5 meters tall and nearly 3 meters in diameter - is designed to offer sweeping 360-degree views of the home planet and outer space, as well as the space station itself. It's not just for the crew's viewing pleasure; a robotic work station will be installed early today, providing direct views for astronauts when they operate the station's big mechanical arm.

Six trapezoid-shaped windows encircle the dome. In the middle is the circular window.

During normal operations, the space station crew will be able to keep the round window unshuttered most of the time, along with a couple others. But the windows facing along the direction the outpost is orbiting will need to be closed, except during robotic operations, to protect the fused silica glass against micrometeorite strikes. Each window has four panes.

The shutters swung open when the spacewalkers were back inside. The nearly six-hour excursion ended a little early because of the risk of elevated carbon dioxide levels in Behnken's suit; he was fine, but flight controllers did not want to take any chances.

Endeavour and its crew of six will depart the space station on Friday and return to Earth on Sunday.

The next shuttle visit has been delayed. Discovery had been scheduled to blast off in mid-March with spare parts and science experiments, but the unusually cold weather stalled preparations. The launch is now targeted for April 5.

Only four more shuttle flights remain.