Action shot of the Ultra HD Expedition member Babak Tafreshi as he prepares his camera to capture the glittering canvas of the night sky. The red and green glow in the sky is due to airglow in the upper atmosphere. Image Credit: Babak TafreshiAction shot of the Ultra HD Expedition member Babak Tafreshi as he prepares his camera to capture the glittering canvas of the night sky. The red and green glow in the sky is due to airglow in the upper atmosphere. Image Credit: Babak Tafreshi