Bootes Supervoid: A 330-Million-Light-Year Mystery in the UniverseSeven hundred million light-years may sound vast, yet in cosmic terms it is a reachable horizon — and it is where astronomers have identified the emptiest place in the known Universe. The Bootes Void, often called the Great Void, has puzzled scientists for nearly four decades, inspiring bold theories about its origin and nature. Normally, galaxies are separated by a few million light-years, so at that density the Bootes Void should contain around 10,000 galaxies — yet it does not. The Great Void and Our Place in the UniverseThe discovery of the Bootes Void fundamentally changed cosmology, forcing astronomers to reconsider models of galaxy formation and the large-scale structure of the cosmos. Ultimately, the Bootes Void highlights the immensity of the cosmos — and the minuteness of our own existence.