I was recently looking at the APOD titled "Descent to a Comet". It is about the first landing of the lander Philae on a comet which is also the first landing ever. This is history and it has taken that lander around ten years to get to where it is now. Despite the fact that the lander's harpoon did not fire, it was still able to land successfully and will conduct its mission for 2.5 days and bring back images and data to the Earth. The lander Philae is able to maintain battery life because it is fitted with extensive solar panels that charge it and allow it to function properly.
Very interesting picture !
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