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110 kilometers above the surface of Titan An artist's conception of Huygens' descent. The haze of Titan's atmosphere preferently scatters blue and ultraviolet light, making the upper atmosphere of Titan appears blue in some Cassini images. In reality, the effect of a blue outer atmosphere on Titan may be less prominent than on this rendered image. This was the altitude were the main parachute was jettisoned and first surface structures came into view for Huygen's cameras. ESA / NASA / JPL / University of Arizona / René Pascal