Neptune in Infrared . ... Credit Copyright: Cornell U. Explanation: Neptune has never looked so clear in infrared light. 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. ... A fascinating feature of the above photograph is that it was taken far from distant Neptune , through the Earth's normally blurry atmosphere. ... NASA Web Site Statements, Warnings, and Disclaimers . ...