Astronauts from the International Space Station have begun a third spacewalk to solve the latest technical glitch.
They are trying to fix a jammed joint that is supposed Gang raids Brazil police station ...
Restored Hubble faces upgrade delay ...
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Hubble glitch delays shuttle trip ... to keep the station's solar panels pointed towards the sun.
Scientists are still struggling to repair a new recycling system intended to convert astronauts' urine into drinking water.
During a previous space walk, the astronauts accidentally lost a tool box worth more than $100,000 (Ј65,000).
Hardest mission
This is the third spacewalk made by the crew to repair the International Space Station' solar panels, and it is expected to be the longest and hardest of the mission.
The astronauts will try to complete repairs made during a previous spacewalk earlier this week, when a tool box was lost.
Meanwhile, the astronauts are still trying to repair a water recycling system worth over $150m (Ј100m) that has failed twice since being delivered to the station a week ago by the space shuttle Endeavour last Sunday.
The shuttle mission is the fourth and final of the year.
Endeavour and its crew are to due to land back at Kennedy Space Center in Florida on 30 November.
Nasa had hoped to fly a servicing call to the Hubble Space Telescope last month but delayed the mission to May 2009 to prepare for some additional repair work on the observatory.
(BBC)
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