“The Hidden Signal” –Birth of Light in the Universe

Hubble Deep Field

 

Thirteen billion years ago our universe was dark. There were neither stars nor galaxies; there was only hydrogen gas left over after the Big Bang. Eventually hydrogen atoms began to clump together to form stars—the very first ones to exist—initiating a major phase in the evolution of the universe, known as the Epoch of Reionization, or EoR.

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Exotic Objects –“Switched On the Early Universe”

First Quasar

 

“The first light of the universe might imply the existence of an important population of more exotic objects like faint quasars, X-ray binary stars, or perhaps even decaying/annihilating particles.” –Harvard-Smithsonian Center for Astrophysics

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