protoplanetary nebulae

A form of protoplanetary nebula — A stage in stellar evolution when a star starts to shed its outer layers before coming a true planetary nebula.

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Meanings

noun
  1. pluralplural of protoplanetary nebula
Cite this entry
APA

protoplanetary nebulae. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/protoplanetary%20nebulae

MLA

“protoplanetary nebulae.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/protoplanetary%20nebulae. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “protoplanetary nebulae,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/protoplanetary%20nebulae.

Source: protoplanetary nebulae on Wiktionary, CC BY-SA 4.0.