ALMA deep view of part of the Hubble Ultra Deep Field

The Atacama Large Millimeter/submillimeter Array (ALMA) surveyed the Hubble Ultra Deep Field , uncovering new details of the star-forming history of the Universe. This close-up image reveals one such galaxy (orange), rich in carbon monoxide, showing it is primed for star formation. The blue features are galaxies imaged by Hubble.

This image is based on the very deep ALMA survey by Manuel Aravena, Fabian Walter and colleagues, covering about one sixth of the full Hubble Ultra Deep Field area.