Not exactly on subject here, but for some reason I am reminded of an older article pertaining to our probes farthest out in the heliosphere. I recall reading that scientists have discovered an unexplained force that appears to be slowing down the speed of the crafts. The article left the impression that the probes might actually slow down eventually enough to cause them to fail to break the barrier of the heliosphere.
Seeing the possibility that the magnetic fields might be falling back into the sun gives me a little food for thought at the moment. Now I'm going to have to find the article now!!LOL!