And the 'shock front' isn't a fixed distance out because of variability of solar activity.
Meanwhile... the search ramps up for
planet Tyche out in the Oort cloud, which might be four times larger than Jupiter and the alleged culprit responsible for flinging long-period comets our way.
Pluto out and Tyche in as far as planet count goes is less interesting than the fact it might be an interloper.
Cool stuff. Literally.