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Réf : S09085
Thème :
Essais - Constructions - Satellites - Sondes - Fusées (2314 images)
Titre : In the Vertical Processing Facility
Description : (La description de cette image n'existe qu'en anglais)
(01/29/2002) - In the Vertical Processing Facility, the replacement Reaction Wheel Actuator for the Hubble Space Telescope is moved from its shipping container. Part of Hubble's Pointing Control System, the actuators receiving information from sensors and physically adjust Hubble's position and orientation so that Hubble can view the required celestial bodies. The reaction wheels work by rotating a large flywheel up to 3000 rpm or braking it to exchange momentum with the spacecraft which will make Hubble turn. The RWA is part of the payload on mission STS-109, the Hubble Servicing Mission, scheduled to launch Feb. 28, 2002
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