IBEX has sampled neutral particles from the galactic wind and it’s different than what makes up our solar system. “We’ve directly measured four separate types of atoms from interstellar space and the composition just doesn’t match up with what we see in the solar system…”  (via NASA - IBEX: Glimpses of the Interstellar Material Beyond our Solar System)
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IBEX has sampled neutral particles from the galactic wind and it’s different than what makes up our solar system. “We’ve directly measured four separate types of atoms from interstellar space and the composition just doesn’t match up with what we see in the solar system…”  (via NASA - IBEX: Glimpses of the Interstellar Material Beyond our Solar System)

Source: nasa.gov