How Do We Know How Old The Sun Is?

All life in our solar system depends on the Sun. Yet how do we know how old the Sun is? The animation studio Beakus put together this terrific animated short that looks how scientists determined the age of the Sun and also the estimated life span of Old Sol. 

Turns out, we’re fortunate that our Sun is just middle aged and has enough fuel to keep burning brightly for another 5 billion years. Phew!