This was
your sky.

Simulating the Universe

This cube represents a massive computer simulation of the universe, spanning 500 million light-years. It models the distribution of gas, with blue indicating low-density regions and red showing high-density areas. Such simulations help astronomers understand how large-scale structures, like galaxies and galaxy clusters, form and evolve over cosmic time. They track the gravitational interactions of matter from the early universe to the present.