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What is Neptune's Temperature? | Space
Neptune Facts - Science@NASA
All About Neptune | NASA Space Place – NASA Science for Kids
Neptune - NASA Science
Neptune - Wikipedia
In Depth | Neptune – NASA Solar System Exploration
Neptune | Planet, Moons, Rings, Temperature, Mass, Diameter,
Neptune Facts | Temperature, Surface, Information, History
How Cold Is Neptune? - Important Facts Affecting Temperature
What Is The Surface of Neptune Like? - Universe Today