Impactor with spin (VIDEO) Durham University This video is under embargo. Please login to access this video. Caption A cross section of a 3D simulation run by researchers investigating how a collision between the early-Earth and a Mars-size object might have led to the formation of the Moon. When a small amount of spin was added to the impactor (Theia) a Moon-like object was produced, similar to that when no spin was added. Credit Sergio Ruiz-Bonilla 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.