“Uchuu”, the most realistic simulation of the universe available to everyone

Christian Garavaglia 3 min
Uchuu universe
Uchuu will allow us to study in detail different moments and scenarios in the history of the universe, over more than 13,000 million years.

The most realistic simulation of the universe made so far it is now available to everyone on the internet.

Baptized as “Uchuu” (which means universe in Japanese), this incredible simulation was developed by the National Astronomical Observatory of Japan (NAOJ) in collaboration with different research groups from Spain, the United States, Argentina, Australia, Chile, France and Italy.

Simulation It will allow us to study the evolution of the universe with an unprecedented level of detail and information, from the Big Bang to date.. Among other things, it will facilitate the understanding of phenomena such as the evolution of galaxies and the formation of black holes.

How did they make it possible?

The simulation was made possible by the supercomputer ATERUI II, the most powerful computer dedicated exclusively to astrophysics, which belongs to the National Astronomical Observatory of Japan.

The result “is three petabytes of data, the equivalent of almost a million photos from a 12 megapixel mobile phone“said Tomoaki Ishiyama, who was in charge of developing and executing the code that created the simulation.

The simulation consists of 2.1 trillion particles in a virtual cube 9.63 billion light years on a side, a dimension comparable to half the distance between the Earth and the most distant galaxies observed.

Argentine scientist participates in the project

The scientist Sofía Alejandra Cora, from the Instituto de Astrofísica de La Plata in Argentina, participates in the Uchuu project. Cora is an independent researcher at the National Council for Scientific and Technical Research (Conicet) and an associate professor at the Faculty of Astronomical and Geophysical Sciences of the National University of La Plata.

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“The main objective of my participation in this project is generate a catalog of galaxies from the Uchuu simulation data, which considers only dark matter, “he told BBC Mundo.

He added that “for this, information on the properties of dark matter halos and the way in which they grow and merge over time is taken as a basis.” “AND a semi-analytical model of galaxy formation and evolution is applied which takes into account numerous physical processes that determine the properties of galaxies, “he continued.

According to Cora, “the most recent version of the model used by our work group in Argentina is described in an article in the magazine Monthly Notices of the Royal Astronomical Society, MNRAS. This task is under development. “


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