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protoplanetary disk

   Also found in: Dictionary/thesaurus, Wikipedia 0.20 sec.
protoplanetary disk [‚prōd·ō‚plan·ä‚ter·ē ′disk]
(astronomy)
proplyd


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Instead, they're part of a protoplanetary disk surrounding a young star.
Banana split in space by Sohn, Emily / Science News for Kids
Energy transferred from tiny particles in the protoplanetary disk to embryonic planets is a key factor in determining just how long the disk will remain intact and how massive any planets emerging from the disk materials can become.
Groovy Science: Cassini gets the skinny on Saturn's rings by Cowen, Ron / Science News
But Orion's protoplanetary disks are being eroded by the harsh ultraviolet light and intense winds from a massive star within the nebula.
Planet potential by Science News
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