In plasma physics, the Heliosphere is a vast cavity formed by the Sun, a “bubble” continuously “inflated” by plasma originating from that body known as “solar wind’ and separating our own solar system, from the vastness of interstellar space. The outermost reach of the Heliosphere comprises three major sections called the Termination Shock, the Heliosheath, and the Heliopause, so called because solar winds and interstellar winds meet to form, a zone of equilibrium.
Only five man-made objects have traversed the heliosphere to penetrate interstellar space: Pioneer 10 and 11 launched in 1972-73, Voyager 1 and 2 launched in 1977 and New Horizons which left earth’s atmosphere, in 2006. Of those five only three remain active and continue to transmit data back to our little blue planet.
Spectacular images may be found on-line if you’re inclined to look them up. Images such as this…
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