Tag Archives: real

Time Defined

Time, itself, does not exist.

It is as imaginary as angels, demons, muses, and ideas.

Time is one component of the medium in which our physical world exists, the other being the subject of next month’s blog, space.

So, how is it that we can measure a thing that does not exist? It is a matter of relationship. As a medium component, time is intimately related to all existence. Why? Because existence is change.

We perceive existence only by way of physical, chemical, or nuclear change. We see light from fusion that is a star. We hear sound that is displacement of atoms, ions, or molecules. We even feel changes in pressure. All change happens only through time.

Our moon moves through space and time in patterns that allow us to “tell time”.

  1. New Moon rises and sets with the sun;
  2. Each day the moon rises and sets later (some 50 minutes);
  3. Waxing moon gets brighter on the sun (right) side, waning stays brighter on the sun (left) side;
  4. The photo is a waxing crescent moon with the sun to the right and below the moon soon after sunset;
  5. The sun sets north of west in summer—to the right of the moon in the photo. That gives the crescent moon the appearance of pouring water rather than
    holding it. Some call this a dry (no water) moon and a cup crescent that appears to hold water a wet moon. I would reverse that, calling this moon wet because it pours the water out. In any case, it is a summer moon.
  6. This photo is a waxing crescent summer moon taken after sunset (around 9 p.m.) in early June.

I believe my conclusion is unambiguous; however, I welcome corrections and reflections. I could be wrong.

All existence (of the physical world) is change is matter and/or energy through space and time.

E = mc­2

Don’t see time in this relationship? It’s hidden in the c, the speed of light, which is a ratio of change in space (distance) to change in time, or distance divided by time.

Time, itself, may not exist, but it is still as real as angels, demons, muses, and ideas.