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What type of nebula contains stars of spectral types o and b?

User Keston
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Answer:

An emission nebula, otherwise known as an H II region.

Step-by-step explanation:

These nebulae are composed mostly of ionized gases, primarily hydrogen, illuminated by young and hot stars such as those of spectral types O and B. The powerful ultraviolet radiation emitted by these massive and energetic stars excites the surrounding gas, causing it to glow brightly. Emission nebulae are often found in star-forming regions and are some of the most visually stunning and colorful objects in the night sky.

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User Schwa
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