preplanetary nebula
Noun
Meaning
preplanetary nebula (plural preplanetary nebulae or preplanetary nebulas)
(astronomy) A stage in stellar evolution when a star starts to shed its outer layers before coming a true planetary nebula.
Noun
preplanetary nebula (plural preplanetary nebulae or preplanetary nebulas)
(astronomy) A stage in stellar evolution when a star starts to shed its outer layers before coming a true planetary nebula.