Neptune takes 19 hours to complete its spin. It takes 165 Earth years to make one orbit around the sun, which equates to one year on Neptune. Neptune is the eighth planet in the solar system, and it is at an average distance of 2.8 billion miles from the sun.
Neptune’s atmosphere is made up mostly of hydrogen with a smaller amount of helium and methane. Neptune’s blue appearance is a result of methane's absorption of red light. Its average temperature is -373 degrees Fahrenheit. Neptune has a dynamic atmosphere with temperature changes and fast wind speeds. The area around Neptune’s equator has an average wind speed of over 700 miles per hour, which is faster than the speed of sound on Earth.