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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Normally, astronomers can only identify about 100 planetary nebulas in galaxies that lie outside of Earth’s neighborhood.
—
Margherita Bassi, Smithsonian Magazine, 23 June 2025
The snapshot above showcases NGC 1514, a planetary nebula that resides roughly 1,500 light-years from Earth in the constellation Taurus.
—Sharmila Kuthunur, Space.com, 15 Apr. 2025
Today's photo concerns the planetary nebula NGC 1514.
—Eric Berger, ArsTechnica, 15 Apr. 2025
This small planetary nebula, like others like it, was formed by gases in the outer layers of a dying star.
—Miguel Claro, Space.com, 22 Mar. 2025
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Margherita Bassi, Smithsonian Magazine, 23 June 2025
The snapshot above showcases NGC 1514, a planetary nebula that resides roughly 1,500 light-years from Earth in the constellation Taurus.
—Sharmila Kuthunur, Space.com, 15 Apr. 2025
Today's photo concerns the planetary nebula NGC 1514.
—Eric Berger, ArsTechnica, 15 Apr. 2025
This small planetary nebula, like others like it, was formed by gases in the outer layers of a dying star.
—Miguel Claro, Space.com, 22 Mar. 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 12 Jul. 2025.
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