Well? Is there? You decide.
Both MERs were designed for a nominal mission duration of 90 Earth days. Spirit is now approaching 6 Earth years of operation. IOW, they have greatly exceeded their life expectancy. Sooner or later, something was going to fail and end their capability to perform their mission. They are, after all, robotic craft with no humans around to maintain them. In that respect, they have performed much, much better than anyone could have reasonably expected.pberrett":qrnhxdgg said:To be it highlights a lack of redundancy to deal with a situation like this. One could reasonably have anticipated that at some point the rover would have become bogged. They should have included something - an arm, an airbag or something else that would have addressed this problem.
You said it so well, i had to quote you, just to have it said one more timeCalliArcale":13opmk8m said:I went for "Yes" because I'm feeling optimistic, and because this mission has so vastly exceeded expectations already. ;-) But the reality is, of course, that we can't tell. And NASA doesn't seem quite so optimistic. The good news is that Spirit did get bogged down in a very scientifically interesting place, so if it does get stuck for good, the mission isn't over yet.