Alongside folklore, mythology, entertainment, history and all the other stuff that storytellers are required to have a handle on, we have historically been required to grapple with the big questions of life and philosophy, which is handy because I found myself cogitating on the The Universe and Infinity the other morning when I should have been writing Folk Tales Corner.
Our universe is not infinite. Big, yes, but it does have limits, edges, a countable number of stars. I say countable, no one has the time, information or energy to do more than guestimate wildly in the billions of trillions. It’s massive beyond any human ability to grasp. It is, however, not infinite.
An immortal being travelling through an infinite universe would be able to carry on going. Every planet hop or galaxy jump taking them to somewhere they had never been before, filled with new wonders. In our finite universe, though, they will eventually manage to have been to every place, seen every star, galumphed through each galaxy, sidled around every single solar system, mooched on all the moons. They will have no choice but to start going to places they have been before.
The vast stretches of time it will have taken to range around the circumference of all that is, mean that when they come back for a second visit, forests will have been replaced with savannahs, complete kingdoms of critters extinguished by an unfortunate meteor, others developed tool use and language. All the old familiar places altered outside the limits of recognition, cities and civilisations raised and fallen. Old friends so far forgotten they are beyond even the memory of myth. Ice ages come or gone, continents drifted, new mountain ranges pushed up and valleys opened in to oceans.
The farther back their first visit the more far reaching the change. Solar systems spiralled off in to space, Suns sixty times the size of ours with their entire entourage of rotating rock and gas balls slurped down in to black holes. Even the celestial alliances of the great galaxies, waltzing through the void, collide, and in doing so rip each other apart. There is very little in the way of direct impact involved, interstellar distances being what they are, but waves of force and energy – gravity, magnetism, radiation, – tear the hot hydrogen balls to ribbons, grind their satellites to dust, strewn between the remaining stars and set on new courses as asteroids and comets, hurtling, homeless, through the endless void.
Eventually our undying traveller will return to places so changed they have passed even the destruction of the old, Nebulae will have given birth, and there, there will be fresh cinnamon swirls of sweet new suns, swinging their children of hot rock and cold gas around them; giggling baby galaxies taking their first helical steps, replete with previously undiscovered elements forged in the bellies of super novas. Our universe is not infinite, but it is big enough that even an immortal being who could journey through space at the speed of light would be surprised every now and then.
I’ve heard some describe our universe as “near infinite”. They are wrong. There is no approaching infinity. I’m all for grey areas and non binary thinking, but when it comes to infinity something either is or is not. Even our mind bogglingly humungous universe has limits. Eventually the last sun fizzles out, turning off the final light in the cold, dark, anticlimax at the end of all things, when energy itself gives up, and even an immortal comes to a halt as the last electron stops spinning around the last atom in the heat death of the universe.
And those limits make it just a grain of sand on the beach as far as infinity is concerned. No matter how big a finite thing gets it can never approach infinity. You can make a bigger universe than ours, expand it by zillions of light years, add as many noughts as you like, multiply by illions of illions, to the power of even more illions, but if there is a number on it, it is instantly doomed to finity, and all that dazzling wonder becomes a single grain of sand on that beach as the camera zooms out to reveal the beach itself is a grain of sand in a desert, and that desert is a speck of dust on the floor of the endless warehouse of infinity where the shelves stretch off further than the eye can see, stacked with boxes of grains of sand.
Personally I’m ok with our universe being finite, infinity is a bit much.
…here’s to living happily ever after, until the next adventure.
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