| NOUN | object | planetary nebula | 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 |
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| Meaning | 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. | |
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| Broader | nebula | An immense cloud of gas (mainly hydrogen) and dust in interstellar space |
| Spanish | nebulosa planetaria | |
| Catalan | nebulosa planetària | |
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