How Big is The Universe
Close your eyes and let your mind drift into the vast, silent expanse of the cosmos. A gentle journey into the true scale of the universe. The observable universe is a sphere with a radius of 46.5 billion light-years, containing over 2 trillion galaxies. Yet the true universe may be far larger—perhaps infinite—and most of it will never be seen. Even in the observable sphere, 85% of the matter is invisible dark matter, and 95% of the universe's energy is unknown. Let the quiet enormity of the cosmos carry you into a deep and restful sleep.
The skinny
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