How long is a 'year' for each of our eight planets?

Orbital periods expressed in Earth days. Mercury 87.66 Venus 226.455 Earth 365.25 Mars 686.67 Jupiter 4331.865 Saturn 10760.265 Uranus 30684.65 Neptune 60193.2. read more

A Year On Mercury: To put it simply, Mercury has an orbital period of 88 days (87.969 to be exact), which means a single year is 88 Earth days – or the equivalent of about 0.241 Earth years. read more

Length of Year for Planets in Order. The length of a year on any given planet is determined by how long it takes for that planet to make one revolution around the sun. Since every planet travels at a different speed and has a different orbital path in regard to size and shape, the length of a year can vary greatly from planet to planet. read more

Here on Earth, we consider a year to be 365 days. Unless of course it’s a Leap Year, which takes place every four years (in which it is 366). But the actual definition of a year is the time it takes our planet to complete a single orbit around the Sun. read more

Listed below are the planets year lengths in earth days from shortest to longest. 1. Mercury: One year on planet Mercury takes just 87.97 earth days. 2. Venus: It takes 224.7 earth days for Venus to travel once around the sun. 3. Earth: One year on planet Earth, or one orbit around the sun, takes 365.26 days. read more