The astrophysicists have created the largest 3D map of the Universe. While working on it, the experts discovered that the expansion rate of the Universe is not the same as it was previously thought. People started to create maps a long time ago. Millennia ago, the first Babylonian tablets depicted the essence of the modern maps. Today, there may be a map that reflects not only the terrain, but also the outer space.
The new map of the Universe contains a huge amount of details and more than before. The scientists from the University of Waterloo in Canada have been working on it for almost 20 years. The map unites nearly 4 million galaxies and quasars.
One of the authors, Will Percival, considers the new map to be the complete story of the expansion of the Universe. Part of the story, he argues, is that about 6 billion years ago, the expansion of the Universe began to accelerate, and since then, that acceleration has not stopped or decreased.
To compile the map, the scientists used data from an optical telescope in New Mexico. It was doing an extended spectroscopic survey with baryon vibration. Based on the available data, the scientists have found that the generally accepted expansion rate of the universe is about 10% lower than the value that was calculated at the distance from the nearest galaxies.
And it is the new card that allows us to speak with a complete confidence about the discrepancy in the Hubble constant. Jean-Paul Kneib, a head of the study, an astrophysicist at the Swiss Federal Institute of Technology, believes that he and his colleagues have managed to systematize technology that has the most accurate measurements in the widest range of space time.
The map contains elements of the Universe that are at least 11-6 billion years old. It reflects later red galaxies and younger blue ones.