real science for today's homeschooler
How old are you on a different planet?

What is a year?

We measure age in years. A year is a unit of time equal to the number of days it takes the planet to travel all the way around the Sun and return to its same location along its orbit.

Earth takes 365.25 days to make a trip around the sun, so our calendar year is usually 365 days. Once every four years, one day is added to the calendar at the end of February to account for the 0.25 day each year. That’s why we have a “leap year” every four years.

If you lived on another planet, a year would not be 365 days because each planet takes a different amount of time to make a trip around the Sun, based mainly on its distance from the Sun. (The farther away from the Sun, the larger the orbit and the longer it takes to go around the Sun.) Assuming you still referred to a “year” as one trip around the Sun, your age in years would be very different from what it is on Earth.

 How many years old would you be on different planets?

To calculate your age on different planets, first, divide your age by 365.25. Then multiply that answer by the number of days in the “year” of each planet. You can find that information in the table below:

Planet

Days in Year

Your Age

Mercury

87.97

Venus

224.70

Mars

686.67

Jupiter

4331.87

Saturn

10760.27

Uranus

30604.65

Neptune

60189.48

 

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