spiral galaxy
noun
: a galaxy exhibiting a central nucleus or barred structure from which extend curved arms of higher luminosity
called also spiral nebula
Examples of spiral galaxy in a Sentence
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Located in the constellation Leo, spiral galaxy NGC 3370 has long been a favorite among astronomers.
—
Kenna Hughes-Castleberry, Space.com, 4 Nov. 2025
In a spiral galaxy like ours, which has a flat disk filled with opaque, UV-absorbing dust, the effects would be essentially zero for a planet like Earth that was embedded in the disk’s outer suburbs.
—Phil Plait, Scientific American, 30 Oct. 2025
But the Outriggers quickly traced the signal to NGC4141, a spiral galaxy in Ursa Major.
—Neetika Walter, Interesting Engineering, 22 Aug. 2025
These spiral galaxies are in the process of colliding and will eventually merge completely.
—Katie Liu, Discover Magazine, 31 July 2025
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Kenna Hughes-Castleberry, Space.com, 4 Nov. 2025
In a spiral galaxy like ours, which has a flat disk filled with opaque, UV-absorbing dust, the effects would be essentially zero for a planet like Earth that was embedded in the disk’s outer suburbs.
—Phil Plait, Scientific American, 30 Oct. 2025
But the Outriggers quickly traced the signal to NGC4141, a spiral galaxy in Ursa Major.
—Neetika Walter, Interesting Engineering, 22 Aug. 2025
These spiral galaxies are in the process of colliding and will eventually merge completely.
—Katie Liu, Discover Magazine, 31 July 2025
See All Example Sentences for spiral galaxy
Cite this Entry
“Spiral galaxy.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/spiral%20galaxy. Accessed 30 Nov. 2025.
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