Uchuu (meaning “universe” in Japanese) is still there the largest and most realistic simulation of the universe. It consists of 2.1 trillion particles that are placed in a virtual cube. Each side of it is 9.63 billion light-years long, about three-quarters of the distance between Earth and the most distant galaxies observed. Uchuu shows the evolution of the universe at a hitherto unimaginable level of size and detail.
The Uchuu model focuses on the large-scale structure of the universe, not addressing “trifles” such as stars or their planets, but focusing on dark matter, which affects the formation of galaxies and even larger structures. Moreover, this virtual reflection of the cosmos is unique in that it captures the universe not only in space but also in time – Uchuu simulates the evolution of matter throughout almost 13.8 billion years of history from the Big Bang to the present.
What is it for?
This model is used by astronomers to study the largest structures in the universe. One of the scientists who works with him is Julia F. Ereza, who describes how she uses it: “Uchuu is like a time machine: we can go forward, backward and stop in time, we can zoom in on one galaxy or zoom out and view the whole cluster , we can see what is really happening in every moment and every place in the universe, from its beginnings to the present, which is a basic tool for studying the universe. “
The remarkable virtual universe has been created by an international scientific team of experts from Japan, Spain, the USA, Argentina, Australia, Chile, France and Italy. They used the most powerful supercomputer specialized in astronomy, ATERUI II, for its development.
Despite its giant computing power, the creation of Uchuu took more than a year. The main author was Tomoaki Ishiyama, who created the program code: “We used all the 40 200 processors (CPU cores) that were available to create Uchuu. We used 20 million hours of this supercomputer to generate three petabytes of data, equivalent to 894,784,853 images from a 12-megapixel mobile phone. ”
The data of this simulation are publicly available HERE.