SPACE LAB: Where Did All the Gold in the Universe Come From?

The gold in the universe came from giant stars that exploded long ago.

Imagine you have a big, strong star, like a super powerful lightbulb in the sky. This star is made mostly of hydrogen, which is like the simplest building block for everything else in the universe. Over millions of years, the star keeps burning and gets hotter and heavier inside, until one day it can’t hold itself together anymore.

Then, boom!, it explodes in a huge supernova. This explosion throws out all kinds of stuff into space, including some really heavy elements like gold. It's kind of like when you shake a bag full of marbles and candies, the bigger things get thrown out first.

After that big explosion, the gold floats around in space for a long time until it gets pulled together by gravity to form new stars, planets, or even parts of our own Earth!

So next time you see something shiny like gold, remember: it was once inside a giant, burning star that had an awesome supernova party.