But that's partly luck: the panels get somewhat cleaned by passing dust devils. Didn't Spirit end up freezing to death, after it got bogged down? Edit: https:/

But that's partly luck: the panels get somewhat cleaned by passing dust devils. Didn't Spirit end up freezing to death, after it got bogged down? Edit: https://en.wikipedia.org/wiki/Spirit_(rover)#Mars_winter_at_Troy https://en.wikipedia.org/wiki/Spirit_(rover)#Mars_winter_at_... yes: normally they'd park it on a south-facing slope to maximize insolation during the winter, but it was stuck on flat ground.