Welcome back to Cosmos in a Pod! I’m your host, Amitesh, and today we’re traveling back to the universe’s earliest days to uncover the story of the first galaxies. How did these ancient structures emerge from the darkness of the Cosmic Dark Ages, and what role did they play in shaping the cosmos we see today?

Episode Highlights:

The Cosmic Dark Ages

• Began 380,000 years after the Big Bang, when the universe was filled with cold, dark hydrogen gas.
• Small density fluctuations, seeded during inflation, were amplified by gravity, laying the groundwork for structure formation.

The Birth of the First Stars

• Population III stars, the first to form, were massive and short-lived, composed mostly of hydrogen and helium.
• Their intense radiation began the E ...