Tra từ planetary nebula - Từ điển Oxford Learners Wordfinder Dictionary

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planetary nebula
economic growth
overreckoning
nanny
begrime
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Từ điển Oxford Learners Wordfinder Dictionary

planetary nebula

noun

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
• Hypernyms:
nebula