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Measuring the Shape of our Planet

With only tiny reflectors and no active instruments, the Laser Geodynamics Satellite I has provided vital data on the planet’s shape for decades. The 900 pund, 2 foot diameter sphere is made from materials that won’t react to the Earth’s magnetic field. http://space.io9.com/this-glittery-gem-is-in-orbit-helping-us-measure-the-sh-1730956026 #tech

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