Mysterious Energy Ribbon at Solar System’s Edge a ‘Cosmic Roadmap’

A strange ribbon of energy and particles at the edge of the solar system first spotted by a NASA spacecraft appears to serve as a sort of “roadmap in the sky” for the interstellar magnetic field, scientists say. By comparing ground-based studies and in-space observations of solar system’s mysterious energy ribbon, which was first discovered by NASA’s Interstellar Boundary Explorer (IBEX) in 2009, scientists are learning more details about the conditions at the solar system’s edge. The study also sheds light into the sun’s environment protects the solar system from high-energy cosmic rays. [Photos and Images from NASA’s IBEX Spacecraft] “What I always have been trying to do was to establish a clear connection between the very high-energy cosmic rays we’re seeing [from the ground] and what IBEX is seeing,” study leader Nathan Schwadron, a physicist at the University of New Hampshire, told Space.com. Previously, maps from ground-based observatories showed researchers that clusters of cosmic rays — extremely high-energy particles that originate from supernovas — are correlated with the IBEX ribbon. The ribbon is roughly perpendicular to the interstellar magnetic field while cosmic rays stream, on average, along the interstellar magnetic field. (The particles themselves are created from interactions between the solar wind and interstellar matter.) In the longer term, Schwadron said work like this will help scientists better understand more about the boundary between our solar system and interstellar space. This is a region that only one mission — NASA’s Voyager 1 spacecraft — has reached so far, and scientists know little about what that environment is like. More
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