Building on the results of a new supercomputer simulation, the animation shows our universe transitioning from a small, homogeneous, cold cloud of gas to a space permeated by the filaments of matter that make up stars and galaxies. And this simulation is the most complete, detailed and accurate reproduction of the evolutionary process of the universe today.

The virtual “view” of the universe’s past is the result of calculations of the CoDaIII model, the third iteration of Project Cosmic Dawn, which aims to trace the evolution of the universe since the “cosmic middle ages”. It came about 10 million years after the Big Bang. At that time, about 13.8 billion years ago, the hot gas formed at its origin cooled and turned into a completely lightless, motionless cloud.

About 100 million years later, seals began to form in this cloud, which began to pull gas from the surrounding space and form threads that make up the cosmic web. And at the nodes of this network, the first stars began to appear, from which the first galaxies were formed.

Radiation from the first galaxies illuminated the universe, in some places this radiation was so strong that it began to drop electrons from the atoms of the cold gas clouds, marking the beginning of the so-called era of reionization, which lasted up to 700 million years. Years after the Big Bang.

CoDaIII is the first model to account for the complex interactions of light and matter flows in the universe. The model covers the time since the beginning of the “cosmic middle ages” and continues over the next few billion years, showing us the process of redistribution of matter in the universe that has made the universe what it is today.

In addition, animation based on simulation results visually shows us “how the structure of the early universe left its mark on modern galaxies that remember their youth, birth and even their ancestors from the age of reionization.” Source