What Is a Planetary Nebula

question 34

Multiple Choice

What is a planetary nebula?

• A) a planet surrounded by a glowing shell of gas
• B) the disk of gas and dust surrounding a young star that will soon form a star system
• C) the ejected envelope of a giant star surrounding the remnant of a star
• D) a type of young, medium-mass star
• E) leftover gas from a supernova explosion

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