Mercury 88 days
Venus 225 days
Earth 365 days
Mars 687 days (almost 2 Earth years)
Jupiter 4,333 days (almost 12 Earth years)
Saturn 10,759 days (about 29 Earth years)
Uranus 30,685 days (about 84 Earth years)
Neptune 60,189 days (almost 165 Earth years)
When it’s your birthday, you add another year to your age. Another Earth year, that is.
Earth is one of eight planets that circle around and around the sun. Each planet travels along its own path, called its orbit. The time it takes for a planet to complete one whole orbit is the length of its year.
Earth takes about 365 days to make one orbit, so our year is 365 days long. But the planets all move at different speeds, and some planets need to…