Dust on solar panels kills Marslander
The fact that the Mars probe lost more and more power has to do with the amount of dust that has accumulated on the spacecraft’s solar panels. The probe is equipped with two solar panels, each about 2.2 meters wide.
The dust limited the amount of power the craft could draw from. NASA had hoped that a powerful whirlwind could provide a solution by blowing 25 percent of the dust off the solar panels, but that didn’t happen in time. It is not yet known whether or not InSight will have a successor.