NASA / JPL-CALTECH / SCIENCE PHOTO LIBRARY NASA / JPL-CALTECH / SCIENCE PHOTO LIBRARY
Stray stars, conceptual image. Computer illustration based on new research using NASA's Spitzer Space Telescope suggesting that a mysterious infrared glow across the whole sky is coming from stray stars torn from galaxies. When galaxies grow, they merge and become gravitationally tangled in a violent process that results in streams (swirling patterns) of stars being ripped away from the galaxies. Scientists think that Spitzer is picking up the collective glow of stars such as these, which linger in the spaces between galaxies.
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