galaxy : Idioms & Phrases
andromeda galaxy
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noun a spiral galaxy in the constellation of Andromeda that is visible to the naked eye
WordNet
milky way galaxy
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noun the galaxy containing the solar system; consists of millions of stars that can be seen as a diffuse band of light stretching across the night sky
Milky Way System; Milky Way.
WordNet
spiral galaxy
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noun a galaxy having a spiral structure; arms containing younger stars spiral out from old stars at the center
spiral nebula.