关于这张图
NASA Researchers view a demonstration of the moon dust simulator in the 8- by 6-Foot Supersonic Wind Tunnel facility at the National Aeronautics and Space Administration (NASA) Lewis Research Center. The researchers were studying the effect of the lunar lander’s retrorockets on the loose dust on the lunar surface. There was some concern that the retrorockets would kick up so much dust that the crew would lose the ability to see. They also did not know how the dust’s behavior would be affected by the space atmosphere. This small vacuum tank was built for very preliminary investigations into thi…