X-Rays Come from Certain Regions of the Interstellar Medium Because

question 45

Multiple Choice

X-rays come from certain regions of the interstellar medium because

• A) those regions are heated to a very high temperature.
• B) gas molecules in those regions are at a very high density.
• C) dust and gas in those regions are moving very rapidly.
• D) nuclear fusion is occurring in those regions.

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