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So the missions that we are learning about this very interesting region are

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coming from two different spacecrafts. One is the Voyager spacecrafts that were

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launched in 1977. So it took them 30 years to arrive there. And you have also

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the IBEX mission that was just launched in 2008 October and got the first maps

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of the energetic neutrals. So we are learning from these two different

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missions. Voyager is measuring in situ. So it's right there measuring. And the

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IBEX is looking at the global view about the same region.