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Aurora And Glowing Space Shuttle Thrusters Stock PhotoAurora Polaris,Bizarre,Black Color,Close-up,Color Image,Day,Digital Enhancement,Exploration,Horizontal,Igniting,Mystery,Night,No People,Orbiting,Outdoors,Part Of,Phosphorescence,Photography,Red,Space Exploration,Space Shuttle,Thruster,White ColorPhotographer NASA/© Getty ImagesCollection: Photodisc Rare photo of igniting twin engines on US Space Shuttle Discovery, 1991, and red aurora. Red auroras are rare, created in the highest, thinnest atmosphere. They are also visible from great distances. Auroras are polar phenomena caused by electrons.