Planetary Formation in a Hot 2-D Cloud? (IMAGE) Washington University in St. Louis Caption The WUSTL planetary scientists say that the solar system we know today could not have formed out of a flat, hot disk that postdates the sun, like the one shown in this artist's impression. Credit ESO/L. Calçada Usage Restrictions None 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.