The most important and accepted theory about the Universe is ‘The Big Bang’ theory. It actually tells us how this universe is born. You see, the Universe originated from a hot, dense, very rapidly expanding state. It was full of matter and radiation, and over time it expanded, cooled, and the expansion rate began to slow. In addition, gravitational imperfections grew into galaxies and clusters of galaxies or shrank into great cosmic voids. Just Imagine when any bomb explodes, it expands covering the vast area compared to its original size but the expansion doesn’t last long. After causing the damage, it disappears completely. So now, why we can’t compare this expansion to the expansion of the universe. And as the Universe continues on in time, more and more galaxies are redding out as the Universe continues to accelerate. With each second that goes by (on average) thousands of stars and their planetary systems cross that horizon forever and leave our ability to reach them for all eternity. Of the hundreds of billions of galaxies (maybe even as many as a trillion) in our Universe today, only about 3% of them are still reachable. And every time a mere three years goes by, another one fades from our present reachability. Every star will die, nearly all matter will decay, and eventually, all that will be left is a sparse soup of particles and radiation. Even the energy of that soup will be sapped away over time by the expansion of the universe, leaving everything just a fraction of a degree above absolute zero. In this "Big Freeze", the universe ends up uniformly cold, dead and empty. We can consider this as a small hint for the hypothetical fact of the disappearance of the universe.
Not only this, we are living in a time when the universe is expanding and what if this expansion doesn't last long and the universe begins to contract. A contracting universe will shrink smaller and smaller, getting hotter and denser, eventually ending in fabulously compact inferno, a sort of reverse Big Bang and the universe might collapse itself. This is only an assumption but who knows in which assumption the real mystery is hidden. Cheer up, by the time this happens we'll all be long gone.
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ReplyDeleteThank you 😊😊
DeleteI love space, it's such an interesting topic! I always wonder about aliens!!!
ReplyDeleteVery interesting analogy. I love to read about the mystery about the universe and stars.
ReplyDeleteNever thought of what would happen if the universe contracted. Scary. Keshia Richmond
ReplyDeleteI am not thinking about the Universe and the way it changes because it needs millions of years to pass to notice anything. And by then ,we will all be dead.
ReplyDeleteThis is so cool! I'm into space and the universe, and I love to learn more about it.
ReplyDeleteThis is so interesting I could read and listen to it continuously. Good job.
ReplyDeleteyes, the more you think about it, the more your mind is blown! So many mysteries our world holds- and none of us will truly ever know all the answers!
ReplyDeleteI am always curious about the universe and glad to have some indepth theory here. Hope more of such articles get published for readers like us
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ReplyDeleteYou say, "the Universe originated from a hot, dense, very rapidly expanding state" -- some might disagree with that. I'm not one of them :)
ReplyDeleteSpace is amazing! There is still so much to explore here on Earth, I can't wait to hear what else they discover on the upcoming mission to the outer reaches of the Solar System.
ReplyDeleteWhen it comes to what the universe holds, I'm just blown away! Always so much theories that are intriguing! I think explorers just have fun!
ReplyDeleteSpace and astronomy are such fascinating topics! I love anything planet and starts related!
ReplyDeleteI've always wondered about how the universe works...
ReplyDeleteThis is really interesting topic, yes how universe works is always work in its own way.
ReplyDeleteIndeed there are mysteries that are up until now hidden and I guess will forever be hidden. Great read, and it's nice to refresh once knowledge of physical science.
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