___________________Complementarity of Time and Space
The Gregorian calendar
(in honour of Pope Gregory XIII of the Catholic Church) was born in 1582, after
the reforms made to the Roman Republican calendar and then to the Julian
calendar (in honour of Julius Caesar, 46 BC).
To see the beginnings
of this evolution, we must go back to the 5th millennium to discover the first
solar calendar, the one adopted by the Egyptians, based on the star Sirius (the
second brightest star in our galaxy). However, with the recent discovery in
2013 by a team from the University of Birmingham, Scotland, of a lunar calendar
dating back over 10 millennia, the record for the oldest calendar has been
broken.
Put simply, it takes us
8772 hours (on average) to complete an elliptical orbit around the sun. But
with the expansion of the Universe (according to the Hubble constant of 67.4
km/s/Mpc (kilometres per second per megaparsec)), the journey of our galaxy
since the Big Bang event means that time is no longer static in a cycle, like
the hand on a clock. By moving from one point in the Universe to another in the
course of a year, the Milky Way must travel through the Cosmos.
The logical possibility
of going back in time would be to eventually bring the galaxy back to its starting
point of one year. However, this probability is infinitesimally small, because
it would involve disrupting the revolution of the sun around its axis, the
solar system or the spiral-moving nayau of the galaxy. Infinitesimally small,
because if the Andromeda galaxy moves in a different direction to the opposite
direction on the Milky Way, things will take on a new time dimension in the
system.
Abdi-Basid ADAN,
2022
