Image data acquired with a hydrogen alpha filter adds other remarkable features to this wide angle cosmic vista - - pervasive tendrils of energized atomic hydrogen gas and portions of the surrounding barnard ' s loop 这幅透过氢-阿尔发滤镜所拍摄的影像，让无所不在的原子氢云气和部份的巴纳德环现形，成为这幅广角影像的其他精彩特色。
