But this orbit will rapidly decay over the coming week as the spacecraft drags through the top of the atmosphere.

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Iphone sales will slow next quarter and there after maintain a steady sale rate very much like a rocket which has reach an orbit until other forces slows it momentum and its orbit begins to decay.

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Dr Krag and colleagues at Esoc, like a number of teams around the world, are now busy modelling the decay in Phobo-Grunt's orbit.

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