The Gas in a Planetary Nebula Is Composed of

question 76

Multiple Choice

The gas in a planetary nebula is composed of

• A) primarily hydrogen from the surrounding interstellar medium.
• B) primarily hydrogen from the post-asymptotic giant branch star.
• C) hydrogen and heavier elements like helium and carbon processed in the core of the post-asymptotic giant branch star.
• D) primarily helium from the post-asymptotic giant branch star.
• E) carbon and helium from the nuclear reactions that took place on the horizontal branch.

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