Early Solar System space rocks had up to 92% rocky chondrules as natural sorting separated them from ice-rich dust; new study finds |
During the Solar System’s first million years, its earliest outer worlds appear to have formed from a carefully filtered mix of material, with heat-forged chondrules making up between 83% and 92% of their composition. In the young disc, aerodynamic sorting separated these rocky grains from fine matrix containing water ice and organic molecules, leaving the…