I guess it is quite well known that there is an empirical correlation between scales of time and space.
That means that small things are usually move / rotate relatively (compared to its sizes) faster then the large ones.
For example ants move relatively really fast, compared to large animals.
The bacterias are much much faster.
Atoms and electrons live in quite short times, in about 10e-7 seconds scale.
On the other side of scales planets move relatively slow (day or year), stars and galaxies are quite static for our time scale.
In general it looks like the scale of time is almost proportional to the scale of space.
How to explain that using standard physics ideas ?
Is it a kind of inertia properties or something like that ?
For more discussions on this topic – take a look at stack physics