This article is from the source 'bbc' and was first published or seen on . It will not be checked again for changes.

You can find the current article at its original source at http://news.bbc.co.uk/go/rss/-/1/hi/sci/tech/7083264.stm

The article has changed 8 times. There is an RSS feed of changes available.

Version 4 Version 5
Discovery begins return to Earth Discovery shuttle returns safely
(about 1 hour later)
Space shuttle Discovery is returning to Earth after an eventful 15-day mission to the International Space Station. Space shuttle Discovery has landed in Florida after an eventful 15-day mission to the International Space Station (ISS).
During their time at the orbiting outpost, the shuttle's crew delivered a new unit, dropped off a fresh resident and completed a series of spacewalks. The crew touched down at 1301 ET (1801 GMT) at the Kennedy Space Center.
Discovery pushed away from the space station (ISS), some 350km (220 miles) above the Pacific Ocean, on Monday. During their time at the orbiting outpost, the shuttle's crew delivered a new unit, dropped off a new resident and completed a series of spacewalks.
The shuttle is scheduled to land at 1301 local time (1801 GMT) at the Kennedy Space Center, Florida. During one of the spacewalks, a rip was discovered in one of the ISS's solar panels but was later repaired.
At 1259 local time (1659 GMT), shuttle commander Pam Melroy fired the craft's engines in a two-minute "deorbit burn" to slow its speed. During its 60-minute descent back to Earth, Discovery would have reached speeds of up to 30 times the speed of sound.
This manoeuvre signalled the start of a 60-minute descent back to Earth. When ground control gave the green light for the shuttle to return, commander Pam Melroy fired the craft's engines in a two-minute "deorbit burn" at 1259 local time (1659 GMT) to slow its speed.
Earlier, Nasa officials reported no damage to the shuttle's insulation tiles, which protect the orbiter from temperatures of up to 1,649C (3,000F) as it re-enters the atmosphere. Earlier, Nasa officials reported no damage to the shuttle's insulation tiles that protects the orbiter from temperatures of up to 1,649C (3,000F) as it re-enters the atmosphere.
All change The orbiter undertook several steep banking manoeuvers during its return to help slow it down to its land speed of about 220 mph (350 km/h).
Solar scare
The STS-120 mission brought up the Harmony module from Earth. It is a passageway that will link present and future science laboratories on the orbiting outpost.The STS-120 mission brought up the Harmony module from Earth. It is a passageway that will link present and future science laboratories on the orbiting outpost.
Discovery pictured moments after undocking from the space station An unscheduled spacewalk was needed to repair the solar array
Harmony was fitted to a temporary berth during one of the four spacewalks carried out during Discovery's stay. The module will be moved to its permanent position on the ISS structure next week.Harmony was fitted to a temporary berth during one of the four spacewalks carried out during Discovery's stay. The module will be moved to its permanent position on the ISS structure next week.
During the third spacewalk, the crews repositioned a huge girder and solar array tower, only to find a rip in one of the wings of the energy-collecting unit.During the third spacewalk, the crews repositioned a huge girder and solar array tower, only to find a rip in one of the wings of the energy-collecting unit.
With advice from ground engineers, the crews were able to work up a repair solution that involved dangling spacewalker Scott Parazynski out over the split panel to lash the damaged area together.With advice from ground engineers, the crews were able to work up a repair solution that involved dangling spacewalker Scott Parazynski out over the split panel to lash the damaged area together.
The repair meant the crews were able to fully deploy the solar array.The repair meant the crews were able to fully deploy the solar array.
In graphics: Space Station
The dramatic spacewalk has allowed the US space agency to press on with plans to launch its Atlantis orbiter in December.The dramatic spacewalk has allowed the US space agency to press on with plans to launch its Atlantis orbiter in December.
This is the high-profile mission that will bring Europe's major contribution to the ISS - its Columbus laboratory. This will be fitted to the Harmony node.This is the high-profile mission that will bring Europe's major contribution to the ISS - its Columbus laboratory. This will be fitted to the Harmony node.
Once undocked, Discovery flew around the station to film its new configuration.Once undocked, Discovery flew around the station to film its new configuration.
It is returning to Earth with ISS resident Clayton Anderson, who has spent five months on the platform. His place has been taken Daniel Tani, who came up with Discovery to start a two-month tour.It is returning to Earth with ISS resident Clayton Anderson, who has spent five months on the platform. His place has been taken Daniel Tani, who came up with Discovery to start a two-month tour.