Why do you think the astronomical unit is not used to measure distances on earth?

One Astronomical Unit is the distance between the Earth and the Sun, this acts as a sort of a cosmic metre stick. Astronomers don't and cannot measure distances. Distances are merely inferred from what actually has been measured, such as an angle, a relative luminosity, a time period

Explanation:

you would have to use decimals in the quadrillionths if you measure in meters. so 11 0s before the number

i think its 5049.

i hope this !