So, in my research on Planck units I came across some interesting facts. Least of which is that I was mistaken in calling this series of articles a trilogy. I could probably write a damn book on different Planck units and their significance but for now, I’ll continue from the very first instance of the universe.
So, in the beginning the universe was only 1 Planck unit across. This alone is interesting because the atoms of the universe could not fit in such a small space. Anyway, the entire universe was condensed into an extremely tiny space and it is theorised that it was at this time that the Planck temperature was achieved (no prizes for guessing what that is).
Some people know of absolute zero, the coolest point you can physically get to, meaning no movement in the atoms. Planck temperature or absolute hot is the opposite. If Planck temperature is real, it would have only occurred once in this universes lifetime and can only happen once unless there is external force. Think about all the energy in the universe being packed in the smallest space possible. That’s why it can only ever happen once for literally the shortest possible time.
After the Planck era, the universe expands at light speed and the Planck temperature is lost. What happens next is a whole different topic but it gets quite crazy. Anyway, between Planck time, length and temperature you can accurately describe the very physical extremes of the universe. For example, for 1 Planck second the universe was one Planck centimetre across at Planck temperature.
And that is how the universe started.
Until next time, this is Theo signing off…