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NASA’s IBEX observations pin down interstellar magnetic field
Immediately after its 2008 launch, NASA’s Interstellar Boundary Explorer, or IBEX, spotted a curiosity in a thin slice of space: More particles streamed in through a long, skinny swath in the sky than anywhere else. The origin of the so-called IBEX ribbon was unknown — but its very existence opened doors to observing what lies outside our solar system.