Dark Energy!

 DARK ENERGY

May 9, 2021

This pie chart shows rounded values for the three known components of the universe: normal matter, dark matter, and dark energy. Credit: NASA’s Goddard Space Flight Center.

Hey guys! sorry for the break but I really needed some time for this topic. So as you can see my topic is in 'black' cause we are going to talk about darkness, again!😜😜

So let us quickly dive into our mysterious and expanding universe. Let's travel to the dark side!!! 

We know right after the Big Bang the universe exploded in a burst of energy and has been expanding ever since. But all the while gravity is quietly working against the expansion. When the astronomers measured it they found the most incredible thing, it was not just expanding outwards, it was actually accelerating faster and faster outward. Something else was there, a driving force that's pushing everything apart working against the force of gravity. This driving force is what physicists called DARK ENERGY. 

In other words we can say, that the galaxies are moving away from each other, they are accelerating. Now, to accelerate, energy would need to exist right, which causes a force on galaxies, but since it's unknown what the source is, scientists call it DARK ENERGY. 

So, dark energy is some kind of substance that is invisible and undetectable that pushes the space-time mesh apart. Let's imagine our space to be full of bubbles that repel each other. And whenever there's enough space for a new bubble to form, it does. And that bubble repels all other bubbles. These bubbles keep popping into existence, pushing each other apart, pushing space with it. 

Similarly, you have small particles popping in and out of the space called VIRTUAL PARTICLES, which live for a very short time before they annihilate each other. So, maybe the energy of these particles is what's causing the universe to expand.

But if you calculate the amount of pushing from all the virtual particles that exist in the standard model of particle physics, you get too much pushing. You actually get a trillion trillion trillion trillion trillion trillion trillion trillion trillion times too much pushing. So, the current quantum theories of particle physics cannot explain observations of dark energy.

• Some people think we need to add something to those quantum theories, something like super-symmetry.  

• Other people think we actually need to change our theory of gravity-change general relativity, i.e. space expands itself without worrying about any particles. 

This diagram shows the changes in the rate of expansion since the universe’s birth. The shallower the curve, the faster the rate of expansion. The curve changes noticeably about 7.5 billion years ago, when objects in the universe began flying apart at a faster rate. Astronomers theorize that the faster expansion rate is due to a mysterious force — dark energy — that is pulling galaxies apart. Credit: Ann Feild (STScI)

For now, all we know is that the bigger the universe gets, the faster it flies apart. And one day the distance between our Milky Way and the other neighboring galaxies will be growing faster than the speed of light. But when that will happen even our best telescopes won't be able to see those galaxies. So here I end my today's post I hope you enjoyed. 

Hey guys! So, even after searching many sites, I could not find more content than this. I hope you like this because I really didn't get much information, as, still scientists are in dark about it. I did find some good research but as the universe is linked to many things they explain it in the context of certain other things , like the String Theory, which I am unknown about. So I wish you get a basic knowledge about what is DARK ENERGY.