Definition of Protoplanetary nebula

1. Noun. (astronomy) A stage in stellar evolution when a star starts to shed its outer layers before coming a true planetary nebula. ¹



¹ Source: wiktionary.com

Protoplanetary Nebula Pictures

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Lexicographical Neighbors of Protoplanetary Nebula

protopanaxadiol
protopanaxatriol
protopathic
protophilic
protophloem
protophloems
protophyte
protophytes
protophytology
protopine
protopines
protoplanet
protoplanetary
protoplanetary disc
protoplanetary discs
protoplanetary nebula (current term)
protoplanetary nebulae
protoplanetary nebulas
protoplanets
protoplasm
protoplasmal
protoplasmatic
protoplasmic
protoplasmic astrocyte
protoplasms
protoplast
protoplastic
protoplastid
protoplastids
protoplasts

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