When the Universe Glowed Green 💚 | The Calm Before the First Stars |

Around 13 billion years ago, before any star was born, the universe glowed faintly green.
It was filled with hydrogen gas, cooling after the Big Bang — the calm before starlight.
When the first stars ignited, they ended that glow forever.
What remains today is the Cosmic Microwave Background, a faint echo of that ancient light.

💚 This is the forgotten color of the universe.

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