Every visual object isn’t precise -Baizid Ibnay Jahid

Let’s start with the concept of watching an object from a human perspective. We can only see an object when light reflects from its surface. There must be a source of light from which light is going to travel all the way to the surface of the object. Then a small amount of reflecting light will enter the eye from the cornea to the retina, where an inverted image is created. Lastly, that image goes to our brain, where it is inverted again so that we can see the actual one. Within the process, light has to travel from source to object, which means it consumes time.

During the night, we can see numerous astonishing stars in the sky. The distance between those stars and us is a billion light years. For example, Proxima Centauri is 4.24 light years away from our sun. So, light takes 4 years and 3 months to reach us. Therefore, if we set up a telescope now, we would see 4 years and 3 months before Proxima Centauri, not the present one. Just like this, we see the condition of the moon 1.3 seconds ago and the sun 8 minutes, 20 seconds ago.

Imagine that there is a planet 65 million light years away from Earth. There is a sophisticated group of aliens. They manage to invent advanced telescopes. Now if they had tried to look at earth, they would watch not us but the dinosaur. It may seem bizarre to some individuals, but it’s reality.

So the actual thing is, all we observe through our eyes is the past. We can’t see the exact moment. The unfolding events so far will reveal themselves to us, depending on the distance. We have seen many stars in the sky that don’t exist anymore. To illustrate, if a star faced a supernova blast that is 100 billion light years away from us, then we would see it exists. After 100 billion light years, we would know it had been destroyed. Owing to that point, telescopes are called time machines because we can see the past through them.

In 2006, the Harbor Telescope captured the most distant galaxy from us, and it was GNz11. We saw a 13.4 billion-year-old light that was just 400 million years after the Big Bang. But it doesn’t mean that it’s in exact condition right now. Through time, it has evolved, and it must have stars, planets, and comets.

Looking at the universe, from wherever any individual is, the standing place would be the center for that person. With movement, the universe would move according to that person. So there is a limitation to seeing the surrounding environment. It’s a magnificent fact.

After reaching the light in our eyes, the brain takes time to create the feeling of watching. Any information takes 80 milliseconds to form in the brain. That means something that happens just in front of our eyes will take at least 80 milliseconds to watch. Consequently, the present is elusive.

Sunset is a fascinating scenario for anyone. At that time, the sun doesn’t belong to the place where we observe it. The light of the sun bends because of our atmosphere. So we see reflection. Just like this, the light of a faraway star bends because of the sun’s weight. If light from a star or galaxy comes through another galaxy, it bends, which is known as gravitational lensing (weight). So we can’t come to conclusions only depending on our eyes.

So now on, whenever we are going to watch a live stream, remember that we are actually seeing the past. Looking at the sky means watching the history of the universe; sighting a star could mean it doesn’t exist anymore. So from now on, we can say everyone must watch Ghost, even if they don’t want to confess it.