There's not enough real information in the article for useful speculation, IMHO. For instance, is the deceleration absolutely constant, or is the margin of error too great to be certain of that? Have they eliminated cosmic dust? Could it be explained by the gravitational field from a dark star? Probably not, if reputable scientists can't find a reasonable explanation. But these scientists would be working with a ton of mathematical data and measurements that the article doesn't give in detail.
Al Gore invented Pioneer...
Maybe these is something to that giant sucking sound Ross Perot was babbling on about...
"Very funny, Scotty. Now turn the tractor beam OFF."
It's either the 6% tax congress put on them for renouncing their citizenship or Hillary Care's impuded rent tax pulling them towards the National Treasury.
Maybe it's that Brown Dwarf Art Bells been talking about re Hillary.
An a** that massive
This is obviously due to cosmic warming.
I believe this effect can be blamed on Enron!
no, i believe that would have been gary coleman.
JESUS is coming and he aint happy.
Global warming?
Etceteras.