Dark energy is the most mysterious entity in the universe, comprising a whopping 68% of the observable universe. In the vast expanse of the universe, galaxies are speeding away from each other at an accelerating rate. You might think that gravity should slow down this cosmic expansion, but there's a mysterious force at play called dark energy, pushing the fabric of space apart like a cosmic rubber band. One leading explanation for dark energy is the cosmological constant, representing the energy of empty space itself. It suggests that even a vacuum has an energy that can create a repulsive force, driving the universe's accelerated expansion. Dark energy has forced us to reevaluate our current knowledge of the laws of nature, and understanding it could open the door to new, uncharted realms of physics.

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