The solar system’s first solids had a fast start

Around 4.6 billion years ago, the solar system formed from a massive cloud that collapsed into the sun and a disk of gas. Initially, no planets existed, and only stardust filled the disk. As it cooled, mineral grains condensed, forming the building blocks of planets like Earth. Previously, scientists believed this was a slow, peaceful process over millions of years. However, a new study suggests that the solar system’s first solids formed rapidly due to sudden temperature changes in the turbulent disk. This challenges the long-held view of a gradual formation. The study also addresses the limitations of the equilibrium condensation model, which couldn’t explain the composition differences in meteorites called chondrites. These differences suggest that chondrites originated in distinct areas of the solar disk, but the exact process remained unclear until now. QUESTION: How might this new understanding of the solar system’s formation change our perspective on the origins of Earth and other planets?