In the past 13 years, scientists have discovered more than 300 planets outside our solar system, but they have done so indirectly, by measuring changes in gravity, speed or light around stars.
过去的13年中，科学家已发现我们太阳系以外的行星300多颗，但都不是直接观察到的，而是通过测量恒星周围引力、速度或光的变化而发现的。
GOCE, with its sensor, system of supporting instrumentation and control elements, actually forms a single composite gravity-measuring device.
GOCE及其传感器、仪表支持系统和控制元件，实际上构成了一个单一的综合重力测量装置。
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