In a record-tying five spacewalks, Columbia's astronauts outfitted Hubble with smaller but more powerful solar wings, a more robust central power controller, a pointing mechanism, an advanced camera for peering deeper than ever into the universe, and a super-cold refrigerator for resuscitating a disabled infrared camera.
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Over the past week, two teams of spacewalking astronauts outfitted Hubble with smaller but more powerful solar wings, a more robust central power controller, a pointing mechanism, an advanced camera for peering deeper than ever into the universe, and a super-cold refrigerator for revitalizing a disabled infrared camera.
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One gyroscope failed two years ago, but a replacement is too large to be carried up by the Russian spacecraft . A second failed in April, shortly after the current crew arrived, because of a blown circuit breaker in one of its control boxes, called a remote power controller module.
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Columbia's astronauts gave Hubble dlrs 172 million worth of new equipment last week : more powerful solar wings, a more robust central power controller, a reliable pointing mechanism, the most advanced optical camera ever launched to study the stars, and an experimental refrigeration system to revive a comatose infrared camera.
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The control room received repeated emergency signals regarding the levels in the steam / water separator drums, and large excursions or variations in the flow rate of feed water, as well as from relief valves opened to relieve excess steam into a turbine condenser, and from the neutron power controller.
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The second generation Volt has an upgraded powertrain with a 1.5-liter engine that uses regular gasoline; the 18.4 kWh battery pack has new chemistry that stores 20 % more electrical energy and uses fewer cells, 192 compared with 288 on the 2014 Volt; it uses a new power controller that is integrated with the motor housing; the electric motors weigh less and use smaller amounts of rare earth metals.
