POLAR (IMAGE) Université de Genève Caption The dedicated Gamma-ray Burst Polarimetry experiment POLAR on top of China's TiangGong-2 spacelab launched on Sept. 15, 2016. The glowing green light mimics the scintillating light when a gamma-ray photon hits one of the 1,600 specially made scintillation bars. The artwork is based on a picture taken by a camera located several meters behind POLAR. Credit © Institute of High Energy Physics 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.