New observations from NASA’s Spitzer Space Telescope strongly suggest that infrared light detected in a prior study originated from clumps of the very first objects of the universe. The recent data indicate this patchy light is splattered across the entire sky and comes from clusters of bright, monstrous objects more than 13 billion light-years away. Astronomers believe the objects are either the first stars – humongous stars more than 1.000 times the mass of our sun – or voracious black holes that are consuming gas and spilling out tons of energy. If the objects are stars, then the observed clusters might be the first mini-galaxies containing a mass of less than about one million suns.
https://www.spitzer.caltech.edu/news/ssc2006-22-nasa-telescope-picks-up-glow-of-universes-first-objects