One big problem is that we have no idea what is that actual Form of the Heliopause. The shapes depicted by NASA are pure conjecture based on terrestrial satellite data and classic hydrodynamics.CC wrote:
the heliosphere just keeps getting thinner and thinner with distance from the Sun. So where does all of the matter go? It doesn't keep blowing a bigger and bigger bubble, and there is no accumulation at the heliopause. I "think" that the only conclusion is that the matter rains back down to the Sun.
Suppose for a moment that the Heliosheath, and your posited Debye sheath, proximate the form and volume of a Hill Sphere.
Then, were probes to be sent on trajectories extending out from the sun's polar axies, very different densities of matter might be recorded. Instead of "matter rain(ing) back down to the sun", it may be found recycling back through the poles;
~and we might get a better picture of the solar system's orientation in the galaxy !
Nought in our lifetimes, sigh...