MUSE charts distances in the Hubble Ultra Dee Field

This sequence starts with an image of the Hubble Ultra Deep Field from the MUSE instrument on ESO's Very Large Telescope. The first grey circles that appear mark galaxies that had had their distances well measured before the MUSE survey. The more numerous reddish circles that follow are new measurements from MUSE, about 1600 in total. The final crosses mark the positions of galaxies that were only detected in the MUSE spectroscopic data and which were totally invisible to the NASA/ESA Hubble Space Telescope. The colours of the crosses indicate distance, with green closest and red most distant.