So the missions that we are learning about this very interesting region are
coming from two different spacecrafts. One is the Voyager spacecrafts that were
launched in 1977. So it took them 30 years to arrive there. And you have also
the IBEX mission that was just launched in 2008 October and got the first maps
of the energetic neutrals. So we are learning from these two different
missions. Voyager is measuring in situ. So it's right there measuring. And the
IBEX is looking at the global view about the same region.