. With its solar wind going out in all directions, the Sun
blows a huge bubble in space called the heliosphere. The heliopause is the
name for the boundary between the heliosphere and the interstellar gas outside
the Solar System. Interstellar winds mold the heliosphere into a non-spherical
shape, creating a bow shock where they first encounter it. The orbits of the
planets are shown near the center of the drawing.
Copyright 2010, Professor Kenneth R. Lang, Tufts University