NASA | IBEX | What are the Boundaries of our Solar System?

IBEX is a new NASA mission that will study the interaction between the solar wind and the material beyond our Solar System called the interstellar medium. The solar wind flowing out of the sun inflates a bubble that we call the heliosphere. IBEX's job is to study those boundaries and understand how they really work and tell us how the heliosphere is able to do the important job of protecting us here on Earth as well as astronauts in space from the dangerous galactic cosmic rays.