Imagine our solar system as a giant, spinning donut, way back when it was first forming.
The sun was in the middle, and all the planets were swirling around in a big circle, like sprinkles on a donut.
Special metals called iridium and platinum moved outwards from the sun, like the sprinkles moving away from the center of the donut.
Scientists figured this out by studying special rocks called meteorites, which are like clues from the early days of our solar system.
