Background infrared glow captured by NASA’s Spitzer Space Telescope. […] The scientists find that this light is coming from stray stars that were torn away from galaxies. When galaxies tangle and merge -a natural stage of galaxy growth- stars often get kicked out in the process. The stars are too faint to be seen individually, but Spitzer may be seeing their collective glow.
Credit: NASA/JPL-Caltech/UC Irvine
Source: Unmasking a Hidden Glow, The Spitzer Space Telescope.

Background infrared glow captured by NASA’s Spitzer Space Telescope. […] The scientists find that this light is coming from stray stars that were torn away from galaxies. When galaxies tangle and merge -a natural stage of galaxy growth- stars often get kicked out in the process. The stars are too faint to be seen individually, but Spitzer may be seeing their collective glow.

Credit: NASA/JPL-Caltech/UC Irvine

Source: Unmasking a Hidden GlowThe Spitzer Space Telescope.