Moon's internal structure
![Moon's internal structure](https://planetary.s3.amazonaws.com/web/assets/pictures/_2400x2200_crop_center-center_82_line/15612/20180717_Moon-interior.jpg 2400w, https://planetary.s3.amazonaws.com/web/assets/pictures/_1200x1100_crop_center-center_82_line/15612/20180717_Moon-interior.jpg 1200w, https://planetary.s3.amazonaws.com/web/assets/pictures/_768x704_crop_center-center_82_line/15612/20180717_Moon-interior.jpg 768w, https://planetary.s3.amazonaws.com/web/assets/pictures/_576x528_crop_center-center_82_line/15612/20180717_Moon-interior.jpg 576w)
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