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The Role of Dark Energy in the Formation of Galaxies and Clusters
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What is the primary evidence for the existence of dark energy?
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A
The observed acceleration of the universe's expansion
💡 Explanation:
The observed acceleration of the universe's expansion is the primary evidence for the existence of dark energy. This acceleration cannot be explained by the known forms of matter and energy, and it requires the existence of a new component of the universe that has negative pressure.