See how the first light appeared in the universe

Astrophysicists used a large set of simulations to show what happened in the universe during the period

appearance of the first galaxies and reionization.During this process, neutral hydrogen atoms in space turned into positively charged or ionized hydrogen. This allowed light to spread throughout the universe.

The epoch of reionization occurred about 13 billion yearsback and this process has always been difficult to reconstruct. The problem is the complex chaotic interactions between gravity, gas and radiation. Therefore, colossal computing power was used to implement the idea and many scientists took part. Among them are specialists from the Harvard-Smithsonian Center for Astrophysics, the Massachusetts Institute of Technology and the Max Planck Institute for Astrophysics.

"Most astronomers don't have laboratories forconducting experiments. The scales of space and time are too large, so we can only conduct experiments on computers,” explains Rahul Kannan, an astrophysicist at the Center for Astrophysics and one of the project participants. “But we can use the basic equations of physics and a lot of data to model what happened in the early Universe.” .

The simulation shows the gradual change of the universe from complete darkness to light. The project was named Thesan after the Etruscan goddess of the dawn.

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