Atlantis to undock from ISS on final mission

May 23, 2010

The US space shuttle Atlantis prepared to undock from the International Space Station Sunday after delivering tons of supplies on the final mission for the 25-year-old spacecraft.

The crews of both spacecraft were scheduled to bid their farewells and close the hatch closure shortly after 8:00 am (1200 GMT), NASA officials said.

Undocking is set for 11:22 am (1522 GMT).

On Friday, Atlantis astronauts Garrett Reisman and Michael Good completed the mission's final spacewalk at the station that lasted six hours and 46 minutes.

The pair plugged a new ammonia jumper cable into the orbiting space station's huge framework and installed two new batteries that store energy collected by the station's large solar panels.

Each battery weighs 375 pounds (170 kilograms) and measures about the size of a three-foot (one-meter) box. The astronauts swapped out another four batteries during another spacewalk on Wednesday.

Batteries usually last five to six years but the ones that were replaced had functioned for nine years. The old batteries will be brought back to Earth aboard Atlantis.

During their , Good and Reisman also transferred a grapple fixture from the shuttle to the station and reconfigured some tools.

During the 12-day mission, Atlantis and its six-member crew unloaded over 12 tons of equipment, including the communications antenna, power storage batteries and a radiator.

The biggest single element is the five-ton Rassver research module, or MRM-1, which will provide additional storage space and a new for Russian Soyuz and .

The Rassver -- "Dawn" in Russian -- was permanently attached to the bottom of the space station's Zarya module. It carries important hardware on its exterior including a radiator, airlock and a European robotic arm.

The Sunday undocking caps the shuttle's 25-year career during which it has logged some 115 million miles (185 million kilometers). It is due back in Florida on Wednesday at 8:44 am (1244 GMT).

Only two more shuttle launches remain -- one in September for Discovery and the final blast off for Endeavour in November -- before the curtain falls on this era of human spaceflight.

The United States will then rely on Russia to take astronauts to the station aboard three-seater Soyuz spacecraft until a new fleet of commercial "space taxis" is operational.

Explore further: Launch pad where rocket exploded back next year

add to favorites email to friend print save as pdf

Related Stories

Astronauts make 3rd and final spacewalk of mission

May 21, 2010

(AP) -- Two shuttle astronauts took one last spacewalk at the International Space Station on Friday to finish replacing old batteries and tackle some odd jobs as their visit drew to a close.

Atlantis approaches International Space Station

May 16, 2010

The US shuttle Atlantis neared the International Space Station Sunday as its crew prepared to deliver tons of crucial new equipment to the nearly-completed orbital laboratory.

Recommended for you

Politics no problem, say US and Russian spacefarers

6 hours ago

US-Russian ties may have returned to Cold War levels, but an astronaut and a cosmonaut gearing up for the longest flight on the International Space Station said Thursday politics would not disrupt their work ...

User comments : 1

Adjust slider to filter visible comments by rank

Display comments: newest first

omatumr
3 / 5 (1) May 23, 2010
Congratulations!

This would be a good time to review and to communicate the purpose of the International Space Station.

With kind regards,
Oliver K. Manuel

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.