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Twinkle, twinkle oldest stars

By Stephen Ornes / November 21, 2012

Blazars are bright galaxies that send high-powered radiation jets directly toward Earth. They can be used to detect the light in the universe left over from every star that ever shone. In this image, the blazars are shown as green dots; the Milky Way glows orange in the middle. Credit: NASA, DOE, Fermi LAT Collaboration

Astronomers find traces of ancient light in the activity of bright, distant galaxies

Posted in Space | Tagged astronomy, astrophysics, Big Bang, blazar, cosmic fog, cosmology, Fermi telescope, galaxy, gamma rays, getinvolved, Kavli Institute, light, optics, photon, photons, radiation, star, telescope, topstories, University of Texas at Austin, Volker Bromm