The Universe Is Expanding... But Not Everywhere

The video explains the expanding universe, discovered in the 1920s, and the accelerating expansion revealed by the Hubble Space Telescope in the 1990s. This acceleration is attributed to dark energy, a mysterious force that dominates the universe. Dark energy is thought to be a property of empty space, causing the universe to expand. Despite its dominance, dark energy is weak in small spaces, allowing galaxies to remain unaffected. In the distant future, fewer galaxies will be visible, but our galaxy will remain intact due to gravity's strength over dark energy.

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