Due to a malfunction to its stabilizing system, it is expected that the satellite will spin uncontrollably and eventually get lost in space.
The satellite spun out of control and efforts to stabilize it resulted in the expenditure of the majority of its fuel.
The entire satellite spins so that the linear sensor array in the focal plane scans over the earth six times every minute.
For Planck, the circular solar array is fixed on the bottom of the satellite, always facing the sun as the satellite spins around its vertical axis.
As the satellite spun, ground controllers would measure the frequency with which each slit became exposed to the sun to infer the satellite's position.
Their cameras take rock-steady pictures even though they and the satellites spin a hundred times a minute for stability, like a top.
Slowly, the long cylinder-shaped satellite spun through an arc until its blunt nose aimed at a point in space above the earth's distant curved horizon.
As the satellite spun in orbit, some part of the array would always be lit by the sun and provide power to the satellite power bus.
Some satellites spin like tops, Paul said, and I wondered why they bothered to do that, but I didn't ask.
The gigantic, silver-colored, wheel-shaped satellite, although seemingly motionless, spun in its orbit at 6,888 miles per hour.