Southwest Research Institute researchers are deploying a novel solar wind forecasting method to identify the outer heliosphere's first plasma boundary. The effort leverages data from NASA's New Horizons spacecraft as it speeds toward this uncharted region.
This boundary marks where the solar wind's influence ends and interstellar space begins. Understanding its location could reshape knowledge of the heliosphere's structure and the Sun's interaction with the galaxy.
The team integrates analytic and numerical heliosphere models with real-time solar wind predictions. New Horizons, now beyond Pluto, provides rare in-situ measurements from the distant edge of the solar system.
Precisely locating this plasma boundary may help future missions navigate the heliosphere's limits. It also offers clues about how stellar winds shape the environments around other stars.
The work underscores the value of combining forecasting tools with spacecraft data to probe regions no human instrument has yet reached.