a cloud of interstellar gas and dust that reflects the light of neighboring stars.
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Origin of reflection nebula
First recorded in 1935–40
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Science definitions for reflection nebula
A nebula that reflects the light of a nearby star or stars toward Earth rather than producing its own. See more at nebula.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.