After four years of incredible research on the red planet, NASA's landmark InSight lander mission is officially over.

Following a final photo post (and the world's saddest tweet) from the lander on Monday, the space agency officially announced the end of the InSight mission on Thursday, after the spacecraft's solar batteries reportedly finally lost power. It's been four glorious years on Mars for the defiant lander, which touched down on the planet's surface in November 2018.

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