Comment: Re:Great engineering! (Score 4, Informative) 151
Still, we had a visitor to our local Astronomy club explain the one oversight which may ultimately doom Opportunity - dust build up on the Solar Panels. Next probe will probably have a little robotic arm and brush to sweep itself off now and then.
This wasn't an oversight, it was well understood that this would happen. They've gotten lucky that dust devils have cleaned the panels a few times.
The next Mars rover is nuclear powered. There are no attempts at any kind of dust cleaning device- it would be far too heavy and fragile to be worth bothering with.