There is a region of space called the Boötes void, around 330 million light years wide and almost completely empty, and if our galaxy sat at its centre, we might not have discovered that other galaxies existed until well into the twentieth century. - Space Daily

There is a region of space called the Boötes void, around 330 million light years wide and almost completely empty, and if our galaxy sat at its centre, we might not have discovered that other galaxies existed until well into the twentieth century. Space Daily The Emptiest Places in the Universe Might Contain Its Best Secrets WIRED