Image List

These visible-light images compare an actual photograph of the sky (left) taken with the Hubble Space Telescope to a simulated view (right) generated by the Illustris simulation. The simulation accurately reproduces the sizes, types, and colors of galaxies in the universe.

This composite image from the Illustris simulation is centered on the most massive galaxy cluster existing today. It morphs from concentrations of dark matter (at left in blue and purple) to normal matter made mostly of hydrogen and helium gas (at right in red, orange and yellow).

This still frame from the Illustris simulation is centered on the most massive galaxy cluster existing today. The blue-purple filaments show the location of dark matter, which attracts normal matter gravitationally and helps galaxies and clusters to clump together. Bubbles of red, orange and white show where gas is being blasted outward by supernovae or jets from supermassive black holes.