It's not quite accurate to say that 12 Earth years equal 1 year on Jupiter. It's closer to say that 12 Earth years equal one Jovian year.

Here's why:

* Orbital Period: A year is defined as the time it takes for a planet to complete one orbit around its star. Jupiter takes approximately 11.86 Earth years to complete one orbit around the Sun.

* Different Frames of Reference: We use Earth years as our standard measurement of time. Jupiter's year is significantly longer because it takes a much longer time to orbit the Sun due to its greater distance from the Sun.

So, while it's not exactly 12 Earth years, it's a good approximation to remember that a Jovian year is about 12 times longer than an Earth year.