Image: Protoplanetary-disk
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Protoplanetary-disk.jpg (576 × 312 pixels, file size: 33 KB, MIME type: image/jpeg)
Description: Artist's concept of a protoplanetary disk, where particles of dust and grit collide and accrete forming planets or asteroids
Title: Protoplanetary-disk
Credit: NASA; http://origins.jpl.nasa.gov/stars-planets/ra4.html
Author: NASA
Permission: NASA material is within the public domain if not otherwise noted
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
Image usage
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