The nature of Triton's unusual orbit around Neptune is the focus of much discussion and speculation. Neptune is the eighth most distant planet from the Sun, thirty times the Earth-Sun distance. Neptune is the fourth largest planet, almost four times Earth's diameter. Surprisingly, Neptune radiates about twice as much energy as it receives from the Sun. A fascinating feature of the above photograph is that it was taken far from distant Neptune , through the Earth's normally blurry atmosphere.
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