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NASA is having a robot spacecraft built that will be able to act as a space mechanic, servicing satellites in orbit.
The space agency announced this week that it awarded a contract worth $127 million to Palo Alto, Calif.-based Space Systems/Loral for the robotic spacecraft, dubbed Restore-L.
The project is designed to lead to a greener, more sustainable space program since the satellites could be refueled and their lives greatly extended.
A satellite can work only as long as it has propellant -- and only so much can be stored in its tank at launch time.
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