## Harry Hill and Professor Brian Cox

Actually Harry, it is just a bit more complex than that!

Where:

*T* is the gravitational time dilation of an object at a distance of *r*.

*d**t* is the change in coordinate time, or the interval of coordinate time.

*G* is the gravitational constant*
M* is the mass generating the field

is the change in proper time *d*τ, or the interval of proper time.