We're finding these discrete, powerful waves that wash over the spacecraft, kind of like rogue waves in an ocean, they carry a tremendous amount of energy.

Justin Kasper

It is a really important region to get into because we think all sorts of physics potentially turn on, and now we're getting into that region and hopefully going to start seeing some of these physics and behaviors.

We were fully expecting that, sooner or later, we would encounter Read MoreThe sun corona for at least a short duration of time.