| http://www.w3.org/ns/prov#value | - On September 29, as its own silent but joyous celebration of its first anniversary of being in space was winding down, the spacecraft stopped thrusting so mission controllers could conduct routine maintenance on components in 2 of its subsystems: attitude control and ion propulsion. (Thrusting is suspended during these activities principally because the orientation in which the main antenna is aim
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