The Heliosphere is a vast region of space dominated by the solar wind, a stream of charged particles released from the Sun. It extends far beyond the orbit of Pluto, creating a protective bubble that shields the solar system from cosmic radiation and interstellar matter.
Within the Heliosphere, the solar wind interacts with the interstellar medium, forming a boundary known as the heliopause. This boundary marks the transition between the solar influence and the surrounding interstellar space, making the Heliosphere a crucial area of study for understanding our solar system's environment.