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
Recent Examples on the Web
Also called the Southern Pinwheel, this spiral galaxy is a hotbed of star formation.
—
Marta Hill,
Scientific American,
16 June 2026
The Leo Triplet is made up of the spiral galaxies M65, M66 and NGC 3628, which are located about 30 million light-years from Earth in the constellation Leo.
—
Anthony Wood,
Space.com,
3 June 2026
Approximately 60% of all galaxies are believed to be spiral galaxies (including the Milky Way, which contains Earth), and spiral galaxies contain most of the stars in the universe, per ESA.
—
Staff Author,
PEOPLE,
17 May 2026
Billions of years ago, a young spiral galaxy began to grow in a crowded part of the universe.
—
Lisa Kewley,
The Conversation,
14 May 2026
See All Example Sentences for spiral galaxy
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Marta Hill,
Scientific American,
16 June 2026
The Leo Triplet is made up of the spiral galaxies M65, M66 and NGC 3628, which are located about 30 million light-years from Earth in the constellation Leo.
—
Anthony Wood,
Space.com,
3 June 2026
Approximately 60% of all galaxies are believed to be spiral galaxies (including the Milky Way, which contains Earth), and spiral galaxies contain most of the stars in the universe, per ESA.
—
Staff Author,
PEOPLE,
17 May 2026
Billions of years ago, a young spiral galaxy began to grow in a crowded part of the universe.
—
Lisa Kewley,
The Conversation,
14 May 2026
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 5 Jul. 2026.
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