protoplanetary disk

[ prō′tə-plăn′ĭ-tĕr′ē ]

A rotating disk of dust and gas that surrounds the core of a developing solar system. It may eventually develop into orbiting celestial bodies such as planets and asteroids. See more at planetesimal.

Words Nearby protoplanetary disk

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

How to use protoplanetary disk in a sentence

We see the protoplanetary disk around it at an angle, but nearly “face-on.”
The Most Stunning View Ever of Planets Being Born | Matthew R. Francis | November 9, 2014 | THE DAILY BEAST

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