For the first time, an interactive and didactic map makes it possible to visualize nearly 200,000 galaxies and their exact location in the Cosmos! called Map of the Universe, it is free to explore and download. It was created by astronomers at Johns Hopkins University and is based on two decades of data collected by the Sloan Digital Sky Survey (SDSS). It does not represent the whole Universe, but just a slice, very detailed: each point corresponding to a galaxy, and the color of this point indicates to which type of galaxy it belongs, and to its age.
The video made by Johns Hopkins University details the making of the map. © Johns Hopkins University
The more we advance in the map, the more the galaxies date. At the very top is the cosmic radiation, emitted only 380,000 years after the Big Bang. The Milky Way, on the other hand, is located at the very beginning of the map: “we’re just a dot at the very bottom, just a pixel. And when I say us, I mean our Galaxy, the Milky Way which has billions of stars and planets.explains one of the creators of the map, Brice Ménard, a professor at Johns Hopkins University.