To think that it's only been a touch over 100 years that we've even had confirmation that other galaxies besides our own exist. Prior to that it was thought th

To think that it's only been a touch over 100 years that we've even had confirmation that other galaxies besides our own exist. Prior to that it was thought that the entire visible universe was around 100,000 parsecs across (what we know now to be just the Milky Way.)