Image Information

Release No.: 2018-17
For Release: Thursday, August 16, 2018 - 5:00pm

Astronomers Identify Some of the Earliest Galaxies in the Universe

distribution of satellite galaxies orbiting a computer-simulated galaxy

The distribution of satellite galaxies orbiting a computer-simulated galaxy, as predicted by the Lambda-cold-dark-matter cosmological model. The blue circles surround the brighter satellites, the white circles the ultrafaint satellites (so faint that they are not readily visible in the image). The ultrafaint satellites are amongst the most ancient galaxies in the Universe; they began to form when the Universe was only about 100 million years old (compared to its current age of 13.8 billion years). The image has been generated from simulations from the Auriga project carried out by researchers at the Institute for Computational Cosmology, Durham University, UK, the Heidelberg Institute for Theoretical Studies, Germany, and the Max Planck Institute for Astrophysics, Germany.

Credit: Durham ICC/HITS/MPIA/Auriga/S. Bose et al.