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General and Exploration

• Did astronomers predict the existence of a planet beyond Uranus?
• Where does Neptune get its name from?
• Is Neptune visible to the naked eye?
• How far is Neptune from the Sun?
• How large is Neptune compared to the Earth?
• What does Neptune look like?
• Does Neptune have winds on its surface?
• Why does Neptune appear bluer than Jupiter and Saturn?
• Is any spacecraft from Earth on or near Neptune?

Moons and Rings

• Does Neptune have moons?
• What is special about Neptune's moon Triton?
• Does Neptune have rings?