Quasar quartet embedded in giant nebula reveals rare massive structure in distant universe

@article{Hennawi2015QuasarQE,
  title={Quasar quartet embedded in giant nebula reveals rare massive structure in distant universe},
  author={J. F. Hennawi and J. Prochaska and S. Cantalupo and F. Arrigoni-Battaia},
  journal={Science},
  year={2015},
  volume={348},
  pages={779 - 783}
}
  • J. F. Hennawi, J. Prochaska, +1 author F. Arrigoni-Battaia
  • Published 2015
  • Medicine, Physics
  • Science
  • In a cluster of protogalaxies far, far away Astronomers constantly scour the sky for astronomical objects that can provide insight and constrain their models and simulations of galaxy evolution. Hennawi et al. surveyed the ancient sky at an epoch when the universe was half its age for nebulae: large clouds of ionized hydrogen. They stumbled across a system containing four active galactic nuclei, or quasars; objects that are thought to be the progenitors of galaxies. Finding a nebula with a rare… CONTINUE READING

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