ACS Will Find the Most Distant Galaxies

Copyright: NASA and the ACS Science Team
Unlike more local galaxies, which are visible in the bluer filters as well, the very large "redshifts" of galaxies at the edge of the observable universe mean that no light is emitted at the blue end of the spectrum. The vastly improved red sensitivity of ACS will enable astronomers to pick out and study such primordial galaxies from among the myriad of other, more commonplace, galaxies.
Last Update: 1 September 2019