When scientists measured the amount of infrared light in the Universe, they discovered twice as much as they had expected when they took into account all the past and present galaxies. Where does the extra light stem from? Now researchers have an answer to this cosmic puzzle. Stray stars make up the rest of the light. Apparently, the number of stars that don’t belong to a galaxy is far larger than previously thought.
Scientists believed that primordial galaxies where the source of the extra light, but subsequent research showed that it was not the case. The infirmed hypothesis presumed that antiqued galaxies are so far away that their light has just started to reach Earth.