Whitepaper #433 in the Decadal Survey for Solar and Space Physics (Heliophysics) 2024-2033. Main topics: basic research. Additional topics: outer heliosphere; space-based missions/projects; emerging opportunities.
Voyager 1 & 2, Ulysses, Cassini, and IBEX have shown that the interaction between interstellar medium and solar wind is much more complex and involved than previously believed. This whitepaper proposes to study this interaction in situ at the heliospheric boundaries and to explore the very local interstellar medium beyond with new instrumentation that is built to investigate this final frontier.