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The Effects of Dark Matter and Dark Energy on the Evolution of Galaxies
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What is the primary evidence for the existence of dark matter?
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A
The observed rotation curves of galaxies
💡 Explanation:
The observed rotation curves of galaxies show that the stars in the outer regions of galaxies rotate faster than expected based on the visible mass of the galaxy. This suggests that there is additional mass, or dark matter, present in galaxies that is not visible.