Whitepaper #093 in the Decadal Survey for Solar and Space Physics (Heliophysics) 2024-2033. Main topics: basic research. Additional topics: outer heliosphere; ground-based missions/projects; emerging opportunities.
The outer heliosphere regulates cosmic ray penetration into near-Earth space, reduces space radiation, and makes life possible in our solar system. Voyager and IBEX in-situ and remote observations of the outer heliosphere and the distorted local interstellar magnetic are important for heliospheric modeling. TeV cosmic rays provide a new tool to study the heliosphere interstellar medium boundary.