Comment Re:Dark Matter (Score 1) 296
It's not very likely that this is actually caused by dark matter, which is not believed to exist in amounts that could influence deep space probes in this part of the universe (if the dark matter had a certain density it shouldn't be dark any more).
Another explanation could be a brown dwarf existing somewhere outside the inner solar system, - but I have my doubts something like that exists...
I think the most probable experience is just that NASA simply made a mistake in some calculations...