2 facts
Discover the Cosmic Microwave Background (CMB), the oldest light in the universe. Explore its origins, significance, and what it reveals about the Big Bang and early cosmos.
This ancient light, a relic from the Big Bang, shows incredibly uniform temperatures across the sky, with tiny fluctuations that seeded the formation of galaxies and large-scale structures.
Even in the vacuum of space, there's a faint glow of microwave radiation leftover from the Big Bang, known as the Cosmic Microwave Background (CMB). This omnipresent radiation gives the universe a baseline temperature of approximately 2.7 Kelvin, just above absolute zero, meaning it's never truly 'empty' of heat.
