After four years, InSight's mission is over. It ends for the usual reason; the robot is out of power.
The lander spent nearly 1,500 days on Mars, twice as long as the mission parameters. (NASA lowballs mission parameters fairly consistently).
What kills robots on Mars? It's almost always the same thing; an accumulation of dust on solar panels.
We need an alternative way to power things on Mars or any manned mission will spend half its time sweeping panels!
InSight taught us a lot about Martian seismology and how the red planet lives.
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