Where is the Centre of the Universe?
The universe is all of space and timeand their contents.It comprises all of existence, any fundamental interaction, physical process and physical constant, and therefore all forms of energy and matter, and the structures they form, from sub-atomic particles to entire galaxies. Space and time, according to the prevailing cosmological theory of the Big Bang, emerged together 13.787±0.020 billion years ago,and the universe has been expanding ever since. Today the universe has expanded into an age and size that is physically only in parts observable as the observable universe, which is approximately 93 billion light-years in diameter at the present day, while the spatial size, if any, of the entire universe is unknown.
The universe appears to be a smoothly running mechanism that is always in motion. Moons orbit their planets, planets orbit their stars, and stars in their turn, orbit the centre of their galaxy. This coordinated motion is predefined by the fundamental laws of nature.
But is there a special point among all this motion? Does the universe have a centre?
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