Physics
Physics, 14.04.2020 16:50, KarenH3512

What is a planetary nebula? a. leftover gas from a supernova explosion b. the ejected envelope of a giant star surrounding the remnant of a star c. a type of young, medium-mass star d. a planet surrounded by a glowing shell of gas e. the disk of gas and dust surrounding a young star that will soon form a star system

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What is a planetary nebula? a. leftover gas from a supernova explosion b. the ejected envelope of a...

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