Credit: Heywood et al.; Sophia Dagnello, NRAO/AUI/NSF; STScI
Composite image of galaxy cluster MACSJ0717.5+3745. VLA radio image is superimposed on visible-light image from Hubble Space Telescope. Pullout is detail of distant galaxy VLAHFF-J071736.66+374506.4, likely the faintest radio-emitting object yet found.