The physical dimension of our Cosmos is the one visible to us through our naked eyes or telescopes. One glaring feature is what we see in the large-scale dimension, or the macro-cosmos. The macro-cosmos is composed of the clouds, stars, planets, suns, moons. Together with other minor celestial bodies, they compose the galaxy. And the entire macro-cosmos houses billions of known galaxies. Our galaxy is known to be only a tiny part of a larger stellar system, the Milky Way, which is populated by around 200 billion stars, one of which is our Sun. Our Planet Earth is one of the nine planets (let’s include Pluto since it is still out there playing a role in the dynamics of our Cosmos) that revolve around our Sun.
Also included in the physical dimension of our Cosmos is the realm of atom and its sub-atomic particles, which, for brevity sake, we can call the micro-cosmos. Although this world is invisible to our naked eyes, it can be seen through the use of modern microscopes. Known also as the microscopic world, this world is also populated by material objects that occupy space and have physical qualities like extension, mass, and electric charge. As we know it today, it is in this realm that the electrons, protons, neutrons, quarks, and leptons reside and operate. An atom is, of course, more than this; it is also an energy, vibrantly traveling as a wave across time and space varying speeds or velocities in the form of a light wave, sound wave, radio wave, micro wave, and the like. But we will explore this realm of the Cosmos later. Suffice it say, that both the macro and the micro realms, are governed by the forces of nature have been discovered to direct their operations, behavior, and their relationships. These four dominant forces are known to us today: gravity, electro-magnetic, weak, and strong nuclear forces. How they operate is an interesting area to explore in our discussions later.
There is a third realm which can be included in the physical dimension of the Cosmos, and this is the meso-cosmos, the world of life from its early beginnings to the development of our ecology that forms the necessary backdrop for the appearance of plants, insects, animals, and other subhuman species. What role the meso-cosmos plays in the overall picture of the Cosmos is an equally exciting territory to explore in our discussions later.
In summary, I have categorized the physical dimension of the Cosmos into three, viz., the macro-cosmos (or the large-scale cosmos), the micro-cosmos, and the meso-cosmos. All these three categories are accessible to us through our five senses of sight, hearing, smell, touch, and taste and through the use of telescopes and microscopes. The events occuring at this realm take place within our four-dimensional world of time and space; it is localized and time-bounded. All these three categorization are part of the subjects of our cosmic exploration.
My 6th video - The Grandeur of the Cosmos
- This part of the video presentation is a continuing attempt to explain what Cosmic Anthropology is all about taking off from the inputs discussed in the previous series. click here.
My 2nd video - The Macrocosmic Perspective
- The large-structure of the universe has so much to offer in terms of understanding our nature, beliefs, thinking, feelings, behavior and actions as well as our relationship with our environment and each other. Here's one view of humanity from the perspective of the large Cosmos. It could be relevant and meaningful to us, regardless of our field of academic discipline and specialization. click here.
3-Before the Big Bang - What caused the big bang? What was before the big bang? Whatever really lies beyond the big bang, what has all this got to do with our beliefs, behavior, and future. click here.