The universe has been expanding for over 13 billion years, and scientists have discovered that this expansion is actually speeding up. The distance between galaxies is increasing at an ever faster rate due to dark energy, a mysterious invisible force that makes up approximately 68% of the universe's total energy density. Dark energy is thought to be the result of vacuum energy that permeates all of space, causing galaxies to move away from each other at an accelerating pace.
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Universe has been expanding for over 13 billion years, and scientists have discovered a fascinating phenomenon. Its expansion is speeding up. This means that the distance between galaxies is increasing at an ever faster rate. The culprit behind this accelerating expansion is dark energy, a mysterious and invisible force that makes up about 68% of the universe's total energy density. Dark energy is thought to be the result of a vacuum energy that permeates all of space. As galaxies move away from each other, the distance between them grows faster and faster with the cosmic microwave background radiation serving as a cosmic telescope to observe
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