Protoplanetary disk
![Protoplanetary disk](https://planetary.s3.amazonaws.com/web/assets/pictures/_1200x465_crop_center-center_82_line/19260/20141122_pp-disk.jpg 1200w, https://planetary.s3.amazonaws.com/web/assets/pictures/_768x297_crop_center-center_60_line/19260/20141122_pp-disk.jpg 768w, https://planetary.s3.amazonaws.com/web/assets/pictures/_576x223_crop_center-center_60_line/19260/20141122_pp-disk.jpg 576w)
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