The Cosmic Dark Ages

The video explores the cosmic dark ages, a period before the first stars ignited. It discusses the challenges of studying distant astronomical objects and how light from these objects allows us to see the past. The cosmic dark ages began after recombination, when the universe was filled with ionized hydrogen and helium. The first stars formed 150 million years later, ending the dark ages and starting the epoch of reionization. Quasars and Lyman alpha photons provide insights into this period. The video highlights the importance of new radio telescopes in studying these early cosmic events.

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