Definitions
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun astronomy a
spiral -shapednebula - noun astronomy, obsolete a spiral-shaped
white nebula ; these were generally determined to bespiral galaxies in the 20th century
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun a galaxy having a spiral structure; arms containing younger stars spiral out from old stars at the center
Etymologies
from Wiktionary, Creative Commons Attribution/Share-Alike License
spiral + nebula
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