Definitions from Wiktionary (protoplanetary nebula)
▸ noun: (astronomy) A stage in stellar evolution when a star starts to shed its outer layers before coming a true planetary nebula.
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▸ noun: (astronomy) A stage in stellar evolution when a star starts to shed its outer layers before coming a true planetary nebula.
Similar:
preplanetary nebula,
preplanetesimal,
proplyd,
protoJupiter,
protoMars,
protocluster,
forestage,
protophase,
planetfall,
preburner,
more...
Opposite:
▸ Words similar to protoplanetary nebula
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▸ Idioms related to protoplanetary nebula
▸ Wikipedia articles (New!)
▸ Words that often appear near protoplanetary nebula
▸ Rhymes of protoplanetary nebula
▸ Invented words related to protoplanetary nebula