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Our home galaxy, the Milky Way, feels unimaginably vast. It contains hundreds of billions of stars and stretches roughly 100,000–200,000 light-years across. Within it lies our entire cosmic neighborhood, including the Solar System and countless other star systems. But when compared to the full scale of the Observable Universe, the Milky Way is only a tiny fraction of what exists. The observable universe is estimated to be about 93 billion light-years in diameter and may contain hundreds of billions or even trillions of galaxies. Each of these galaxies can contain billions of stars, planets, and possibly even life. Galaxies also group together into clusters and superclusters, forming a vast structure known as the cosmic web. In this video, we explore: ✨ The true size of the Milky Way galaxy ✨ How astronomers measure the size of the observable universe ✨ Why the universe appears larger than its age suggests ✨ How nearby galaxies like the Andromeda Galaxy fit into the bigger cosmic picture When we compare the Milky Way to the universe, the scale difference becomes almost impossible to imagine. Then we connect this idea to sleep science. Why do thoughts about cosmic scale trigger feelings of awe and wonder? Neuroscience shows that contemplating extremely large spaces activates parts of the brain linked to imagination and perspective. During REM sleep, the brain often simulates enormous environments — allowing us to mentally explore spaces far beyond everyday human experience. The Milky Way feels enormous… Until you realize it’s just one galaxy among trillions. #UniverseSize #MilkyWay #ObservableUniverse #CosmicScale #Andromeda #Astronomy #DeepSpace #UniverseFacts #CosmicPerspective #SleepScience #ScienceDocumentary #Cosmos