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Europe's innovative Goce satellite has switched on the super-sensitive instrument that will make ultra-fine measurements of Earth's gravity. The sophisticated gradiometer will feel the subtle variations in Earth's tug as it sweeps around the globe. The spacecraft has also fired up the British-built engine that will help maintain its orbit. Goce needs tiny but continuous levels of thrust to keep it stable and prevent it from falling out of the sky. European Space Agency (Esa) mission manager Rune Floberghagen said all systems on the spacecraft had now been activated following the launch from Russia last month.
Found this interesting. I had no idea that we possessed the technology to fine tune gravity. Is it possible that something may go wrong?