Thinking about the end of the universe

When you look at the night sky, you can see many stars.

A dark space full of hundreds of stars, it's cosmos.

When we talk about the universe, there is always a question.

It is the question of how big is the universe and where is the end.

We use light to see the size of the universe.

We know that light is the fastest in the universe.

The light at the time of the birth of the universe can be thought of as flying at the speed of light from beginning to end.

In other words, if the universe is about 13.8 billion years old, and the light has reached 13.8 billion years, then the radius of the universe is about 13.8 billion light years.

(Light years: the distance that light travels for one year, the light travels about 300,000km in one second, and the distance for one year is about 9,460,000,000,000km. This is one light year.)

But the universe continues to expand.

Even now thinking about the size of the universe, the universe is getting bigger.

Knowing the radius does not mean that you can measure its size.

We can not know at the moment where the center of the universe is.

Think of the universe as a balloon.

We can see the inflated balloon and the center of the balloon.

The reason is that we look at the balloon outside the balloon.

But the universe is different.

We are attached to a point in the balloon of space.

So, if you look at the other points, you just look away from each other.

It is not known where the balloon center is located.

We think of ourselves as the center of the universe.

We recognize that we are stopped.

We are one of the things that are moving away from this wide universe.