planetary nebula
noun
: a usually compact luminous ring-shaped nebula that is composed of matter which has been ejected from a hot star at its center
Examples of planetary nebula in a Sentence
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That characteristic ionization marks a full-fledged planetary nebula.
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Big Think, 3 Nov. 2025
Indeed, the planetary nebula seen above, known as the Red Spider Nebula and imaged by the James Webb Space Telescope (JWST), is a terrific example of the rich scientific detail and aesthetic beauty these objects can offer.
—Monisha Ravisetti, Space.com, 30 Oct. 2025
The team noted that this find may be the first concrete evidence of PAHs forming inside a planetary nebula, and could help explain where such molecules originate in space.
—Andrew Paul, Popular Science, 27 Aug. 2025
Spotted by Charles Messier in 1764, its the first planetary nebula discovered.
—Kurt Snibbe, Oc Register, 8 Aug. 2025
See All Example Sentences for planetary nebula
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Big Think, 3 Nov. 2025
Indeed, the planetary nebula seen above, known as the Red Spider Nebula and imaged by the James Webb Space Telescope (JWST), is a terrific example of the rich scientific detail and aesthetic beauty these objects can offer.
—Monisha Ravisetti, Space.com, 30 Oct. 2025
The team noted that this find may be the first concrete evidence of PAHs forming inside a planetary nebula, and could help explain where such molecules originate in space.
—Andrew Paul, Popular Science, 27 Aug. 2025
Spotted by Charles Messier in 1764, its the first planetary nebula discovered.
—Kurt Snibbe, Oc Register, 8 Aug. 2025
See All Example Sentences for planetary nebula
Cite this Entry
“Planetary nebula.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/planetary%20nebula. Accessed 10 Nov. 2025.
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