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Réf : S09088
Thème :
Essais - Constructions - Satellites - Sondes - Fusées (2314 images)
Titre : Workers in the Vertical Processing Facility check the position of the Hubble Space
Description : (La description de cette image n'existe qu'en anglais)
(01/29/2002) - Workers in the Vertical Processing Facility check the position of the Hubble Space Telescope's replacement Reaction Wheel Actuator on the Large Orbital Protective Enclosure (LOPE), which is contained in the Multi-Fuse Lightweight Equipment (MULE) for flight. 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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