Literacy Circle

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How Does Universe End?

What is the most challenging question to answer about space? I have been interested in space since I was young, and I wonder if there will be an end to the universe when I was in elementary school. But at that time, I stopped thinking that the universe was bound to be endless, and I started to question this again with this project.

So my question is, how does the universe actually ends?

There are three theories about this question. But before we go through the theories, lets’s watch a video to understand theories better.

[7]

As you can see in this video, there are three ways the universe could end.

Theory 1 – The Big Rip

The Big Rip theory states that the powerful dark energy will twist the structure of the universe, first ripping galaxies apart, then black holes, planets, and stars. This is the wave that occurs when the force that expands the universe is stronger than the gravity that binds the galaxy. As a result, scientists say, the universe will be a desolate grave, with only particles that are not joined to anything floating through the dark space.  [1]

 

 

 

 

 

[4]

Theory 2 – The Big Freeze

The Big Freeze theory states that as the universe continues to expand and becomes less and less energetic, at some point it tilts further toward the force of gravity rather than the force of expansion, causing the universe to revert to contraction. The rate of contraction gets faster and faster over time, causing galaxies and stars and black holes to collide and eventually plunge into the original universe, which was a spot in the Big Bang. [2]

[5]

Theory 3 – The Big Crunch

The Big Crunch theory states that as the universe expands, matter slowly copies and walks on the path of extinction, with stars gradually losing their light, blinking faintly and then slipping away one by one, and after about a trillion years, all matter in the universe, including black holes and galaxies, will disappear. Even the atom cannot avoid collapse. Then no energy or movement would exist, making the universe a perfect grave. This is called heat death which is called the big crunch. [3]

[6]

So which one do I believe?

I believe The Big Freeze theory. This theory is most likely and makes sense from existing evidence. It could, in the absence of dark energy, occur under a flat or hyperbolic geometry. With a positive cosmological constant, it could also occur in a closed universe. From this, I think there is an actual possibility that this theory will happen.

<Sources>

[1]

Ellis, George F. R.; Maartens, Roy & MacCallum, Malcolm A. H. (2012). Relativistic Cosmology. Cambridge, UK: Cambridge University Press. pp. 146–147.

[2]

WMAP – Fate of the Universe

[3]

“Jennifer Bergman, The Big Crunch, Windows to the Universe (2003)”

[4] wattsupwiththat.com/Anthony Watts/July 2, 2015

[5] sciencesource.com/Spencer Sutton

[6] science.howstuffworks.com/William Harris

[7] https://youtu.be/itpLU7OzNV8