<p>Hubble transformed astronomers’ understanding of the universe.</p> <p>The post <a href="https://www.popsci.com/science/one-large-milky-way-galaxy-or-many-galaxies-100-years-ago-a-young-edwin-hubble-settled-astronomys-great-debate/">One large Milky Way galaxy or many galaxies? 100 years ago, a young Edwin Hubble settled astronomy’s ‘Great Debate.’</a> appeared first on <a href="https://www.popsci.com">Popular Science</a>.</p>