astronomy Cosmology Creation/evolution

Four high redshift quasars puzzle astronomers

A team of astronomers led by Joseph Hennawi of the Max Planck Institute for Astronomy, using the W.M.  Keck observatory in Hawaii, have discovered the first quadruple quasar: four quasars with approximately the same redshift of about z ~ 2 and located on the sky in close proximity.  The online article1 from Max Planck Institute is titled “Quasar quartet […]

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