Why solar
It seems to my amateur and untrained eye that the radioactive powered probes and rovers seem to be considerably more robust than the solar powered kit we've been sending of late.
Of course the fission based power source will be more expensive, but how much does a failed project cost when the only reason for failure is that it can't get enough rays from the sun?
Maybe very wrong here but it seems that if we had some old school nuclear power involved then both Curiosity and Spirit would both be running now.
Biting the hand that feeds IT
