The Oldest Thing You Can See in the Universe (It’s Not a Star) | Facty Science | Q&A | GK | #Shorts

Added: 2026-06-03

[00:00:00]Have you ever wondered what the oldest thing you can see in the universe is?

[00:00:04]It's not a star or a galaxy. It's the cosmic microwave background [music] or CMB.

[00:00:11]Think of it as the ultimate cosmic echo.

[00:00:14]About 13.8 billion years ago, the Big Bang triggered an unimaginably hot, dense [music] expansion.

[00:00:23]As the universe expanded, it cooled down.

[00:00:26]Around 380,000 years later, light was finally [music] able to travel freely through space.

[00:00:33]That first light is still bathing the cosmos today.

[00:00:37]Over billions of [music] years, cosmic expansion stretched this light into faint microwave wavelengths.

[00:00:44]It is a literal snapshot of the infant universe >> [music] >> acting as the foundation for modern cosmology and proving how our universe began. [music]