To
@ben d
We can objectively measure both space and time - either separately or together.
We can measure distance in space or distance travelled, or the size of an object (eg length, width, height - these measurements provide distance to match 3 dimensional coordinates) - which are spatial measurements.
These measurements are given in agreed upon units, eg international standards, like nanometre (nm), micrometre (μm), millimetre (mm), metre (m), kilometre (km), etc, or it imperial units used in the US, like inch, foot, yard, mile, etc.
Time is use as a temporal measurement, and they have their own units used in science and engineering. These units are based on particular one cycle or period, eg second, minute, hour, day, week, year, century, millennium, etc.
Since astronomy have to measure distance in greater distance, it make more sense, to use units that are equivalent to the basic units of kilometres or miles, eg Astronomical Unit (AU), light year (ly), parsec (pc).
You wouldn’t use any astronomical units in Quantum Mechanics, which are smaller than micrometre. In Quantum Physics, the Planck units are natural units to measure, not only space, but also time, energy, at Planck scale. Hence, Planck units, include the following magnitude of units:
Planck length
Planck time
Planck energy
These measurements of both spatial distance or temporal measurements are often use together, as well as extra other measurements, eg mass can be used together with spatial distance and time, to acquire various different measurements or magnitudes, such as force, energy.
When distance or length are used together, these give us measurements that are combined to specific measurements, such as change of rate (eg speed or velocity, acceleration).
Then there are other units that include to measure space and time, which have applications such as electromagnetism as used in tv and radio and used in acoustic or sound. They used measurements that are common to both, eg period, cycle, amplitude, wavelength, frequency (eg Hz).
All these measurements and magnitude of units are all man-made, but they are used to measure the real world, and as you know have multiple or countless applications.
Just because time isn’t an “entity”, Ben, it doesn’t mean time doesn’t exist or that it is meaningless.
Using time and distance or length or mass or frequency and so on, is how humans understand the world, be able make predictions based on statistics and probabilities, and to make some things useful out of it.
You are making big deal out of nothing. All you are doing is just making bleating sophistry sound.