The existence of a parallel universe, We are still not sure, but humans have begun to simulate the universe themselves, and there are 8 million .

Assistant Professor of the University of Arizona Peter Behroozi took the team and used computers to model 8 million virtual universes, including 12 million galaxies.

In general, scientists can only infer the laws of the evolution of the universe through data such as existing photographs, and Behroozi’s “UniverseMachine” project provides scholars with an opportunity to validate the theory.

▲ Image from University of Arizona

In a nutshell, Behroozi enters the theory of cosmic evolution that has existed over the past 20 years into computers and simulates an “Ex-Machina” universe based on them. Observing, if this law is followed, the universe is from the big bang (Big Bang) Since the beginning of 400 million years, it has developed into the reality of our real life.

Each “Ex-Machina” universe undergoes a series of tests to measure how similar the Milky Way in the virtual universe is to our actual universe. (The result is) those universes that are most similar to us follow similar underlying physical rules, demonstrating a very powerful method of studying the formation of the Milky Way.

The University of Arizona is written in the official press release. At the same time, this project has also discovered some existing theoretical conflicts.

As we return to the earlier universe, we expect dark matter to be denser and the gas temperature to become higher and higher, which is not conducive to the formation of stars.

Therefore, we originally thought that many of the Milky Way in the early universe should have stopped forming stars for a long time.

Our discovery is the opposite: a certain size of the Milky Way is more likely to form stars efficiently.

After gaining this discovery, the research team turned back and fine-tuned the simulated universes until they finally evolved into our real universe.

In other words, we conclude that the efficiency of the early Milky Way in forming stars is higher than we think.

This also means that the energy created by super black holes and stellar explosions is less effective in killing stars than our theoretical predictions.

According to Behroozi, it is only necessary to simulate the computing power required by a galaxy. “All the computers on the earth add up and it can’t be done for a hundred years… let alone 12 million.” The research team found an innovative way to avoid such huge computational workloads. But compared to the hundreds of millions of galaxy that can exist in our universe /a>, 12 million is still a very small part.

However, this study has also combined resources from the NASA Ames Research Center, the Leibniz-Rechenzentrum in Germany, and the high-performance computer cluster at the University of Arizona, with more than 2,000 processors simultaneously computing for 3 weeks. Out of the research results.

Research papers “UNIVERSEMACHINE: The Correlation between Galaxy Growth and Dark Matter Halo Assembly from z = 0 -10” was published in the Bulletin of the Royal Astronomical Society Monthly.

The title map is from Engadget