The Term "Baryon Cycle," as Astronomers Use It, Refers To

question 13

Multiple Choice

The term "baryon cycle," as astronomers use it, refers to:

• A) the steps in the fusion of hydrogen into helium at the center of stars
• B) the kinds of orbits short-period comets take around the Sun
• C) the movement of interstellar material into the Galaxy and into stars and then the movement out when stars end their lives
• D) the change of individual atoms into molecules in dusty interstellar clouds
• E) exercise equipment they had in the White House for President Obama

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