A Glimpse Into The Time Before Quasars Were Born
The curve shows how the space density of quasars has evolved, from the Big Bang (cosmic time = 0) to the present day.
Credit:
ESO
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European |
ESO — Reaching New Heights in Astronomy
 
 
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European |
ESO — Reaching New Heights in Astronomy
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The curve shows how the space density of quasars has evolved, from the Big Bang (cosmic time = 0) to the present day.
Credit:
ESO
