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spiral nebula

DEFINITIONS OF: spiral nebula

1

n a galaxy having a spiral structure; arms containing younger stars spiral out from old stars at the center

Synonyms:
spiral galaxy
Types:
Andromeda galaxy
a spiral galaxy in the constellation of Andromeda that is visible to the naked eye
Type of:
extragalactic nebula, galaxy
(astronomy) a collection of star systems; any of the billions of systems each having many stars and nebulae and dust
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