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NASA's InSight Mars lander has taken its final selfie. Here it is

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简介InSight's Final Selfie.Image: NASA/JPL-CaltechNASA's InSight Mars lander has sent back its last self...

InSight's Final Selfie.

Image: NASA/JPL-Caltech

NASA's InSight Mars lander has sent back its last selfie of its dust-covered solar panels and deck, in an image taken on its 1,211th 'sol' or Martian day of the mission on April 24.

InSight has been roaming the red planet for the past 3.5 years, capturing images and data that allowed scientists to approximate its crust and core, and refine models of how planets evolved from dust circling the Sun.

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InSight's scientific mission is set to conclude in summer after which it will run out of power. The lander is solar-powered, but dust covering the seven-feet wide solar panels has reduced its production capacity from around 5,000 watt-hours per sol to 500 watt-hours per sol. Once these panels generated power equivalent to running an electric oven for 40 minutes, they now can only power one for 10 minutes. The lander is equipped with two 25 amp-hour lithium-ion rechargeable batteries for energy storage.

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With those constraints, even taking a selfie requires some calculation to stay within the spacecraft's power budget. The selfie arm will now go into the "retirement pose", according to NASA.