PLANETARY NEBULA
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Definitions
There is 1 meaning of the phrase
Planetary Nebula.
Planetary Nebula - as a noun
A nebula that was once thought to be a star with its planets but is now thought to be a very hot star surrounded by an expanding envelope of ionized gases that emit a fluorescent glow because of intense radiation from the star
Example Sentences
"A planetary nebula is an astronomical phenomenon where a dying star expels its outer layers into space."
"The Ring Nebula is one of the most famous examples of a planetary nebula."
"The Cat's Eye Nebula is a planetary nebula located in the constellation Draco."
"The Helix Nebula is another well-known planetary nebula in the cosmos."
"The Butterfly Nebula, also known as NGC 6302, is a complex planetary nebula."
