The Source of the Hot, Intergalactic Gas in Many Rich

question 77

Multiple Choice

The source of the hot, intergalactic gas in many rich, regular clusters of galaxies appears to be

• A) jets of gas ejected by supermassive black holes at the centers of the galaxies.
• B) bursts of star formation in merging galaxies.
• C) exploding stars or supernovae within individual galaxies.
• D) collisions between galaxies in the cluster.

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