The Gas Supplies of the First Galaxies

In 2016 the Atacama Large Millimeter/submillimeter Array (ALMA) imaged galaxies at the very limits of the observable universe

Credit: ALMA (ESO/NAOJ/NRAO)/NASA/ESA/J. Dunlop et al. and S. Beckwith (STScI) and the HUDF Team — This image combines a background picture taken by the NASA/ESA Hubble Space Telescope (blue/green) with a very deep ALMA view of this field (orange, marked with circles). All the objects seen by ALMA appear to be massive star-forming galaxies

As we have already noticed in another post, looking far into space also means looking back in time due to the finite speed of light.