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 »

Neptune has the longest period of revolution around the sun at 165 Earth years. In contrast, Earth's period of revolution is 365.2 days, the time measured as one year. More »

Neptune is a gas giant and an outer planet. In the solar system, the three other gas giants are Uranus, Jupiter and Saturn. Gas giants are massive planets that have a composition of mainly gases. More »

The period of revolution of Mars is 686.98 Earth days, and the period of rotation of Mars is 1.03 Earth days. A planet's period of revolution is the length of one year, or how long it takes the planet to revolve around t... More »

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 »

Mercury's revolution is 88 Earth days. A planet's revolution is the time it takes to make one complete orbit around the sun. This is different than Mercury's rotation period, which is the time it takes this planet to spi... More »

Mars revolves around the Sun once every 687 Earth days, or 1.88 Earth years. It revolves around the Sun at an average distance of 142 million miles, about 50 million miles farther out than the orbit of Earth. More » Science Astronomy Planets