Despite the heliosphere's shielding influence, some cosmic particles do make it into the solar system, however. The particles are the remains of exploded stars sent streaming through space. The charged particles but up against the solar wind, but some uncharged particles make it through. These are the particles IBEX has been searching for since its launch in 2008. Now it has found some, against enormous odds. IBEX sampled neutral hydrogen, oxygen and neon.