The planet Neptune has a sidereal rotation of approximately 16 hours. Unlike the solid surface found on the terrestrial planets of the inner solar system, Neptune is a gas giant composed of regions that rotate at differe... More » Science Astronomy Planets

One year on Neptune is equal to around 165 Earth years or 60,190 Earth days, which is the amount of time it takes the planet to complete its orbit around the sun. Days on Neptune last about 16 hours, which is 8 hours les... More »

Neptune's revolution period is 60,190 Earth days. This is equal to 164.8 Earth years. This is how long it takes Neptune to make one revolution around the sun. More »

A day on the planet Neptune is approximately 16 hours, according to NASA. It is the farthest non-dwarf planet in the solar system from the Sun. It takes Neptune approximately 165 Earth years to orbit the Sun. More » Science Astronomy Planets

A day on Saturn is 10.7 Earth hours long, which is the amount of time it takes for the planet to make a complete rotation on it axis. Saturn makes a full orbit around the sun in a period of time equal to 29 Earth years. ... More »

Jupiter has the shortest day of any planet in the solar system, taking just under 10 hours to complete a single rotation. Due to the speed of its rotation Jupiter has been flattened into an oblate spheroid with a longer ... More »

The planet Neptune has an average rotational speed of just over 16 hours. Like the other gas giants, Neptune lacks a solid surface, and the speed at which different parts of the planet rotate can vary due to a process kn... More »