3D Simulation (IMAGE) Southwest Research Institute Caption An SwRI-led team performed 3D simulations of the streaming instability model of planet formation, where particle clumping triggers gravitational collapse into planetesimals. This snapshot from the simulation shows the vertically integrated density of solids, projected on the protoplanetary disk plane. Credit HST/StSci/SwRI/Simon Porter Usage Restrictions Images/videos may be used by the media and the public for educational and informational purposes only License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.