Everything we see is past (In search of alian

Everything we see is past (in search of aliens)

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Suppose an alien from a planet 6 million light-years from Earth observes the Earth with his telescope.

He had just seen the earth through his telescope.

How will he see the world?

He will see the Mesozoic era going on in the world. Huge giant dinosaurs are roaming around the world. Large trees are full of grass, grass, herbs and shrubs.

There are no high-rise buildings, advanced civilizations, cosmopolitan cities, sophisticated technology, and highly intelligent creatures like humans.

The earth is going through one of the stages of its evolution.

If the aliens are very advanced, the earth will look very pale to them.

Now the question is, why would they see the world like that?

In fact, we have always been observing a past world. We will never be able to see the current form of an object, because it is limited by the finite speed of light.

When light falls on an object and is reflected from there, we can only see that object with our eyes. Since the speed of light is not infinite and it is one hundred and eighty six thousand miles per second (as light can orbit the earth about seven times a second), so even if the object is not too far from our eyes, the light reflected from it is something that comes to our eyes However, time is required, which is negligible.

If the object is located one meter away from our eyes, then roughly this time is 0.0000000000333 seconds.

Scientists usually use a unit called the light year to indicate the position of a very distant object. It is a unit of distance measurement like meter, kilometer, mile.

"The distance that light travels in a year is called a light year."

According to the above definition, if a planet is located six light years away from the earth, then it will take six years for light to reach there from the earth.

So the only ray of light that an alien from a planet 6 million light-years away detected in his telescope was originally sent from Earth 6 million years ago, during the Mesozoic era.

The age of the dinosaurs.

By the same token, if our sun suddenly stopped giving light at this moment, we would realize after about eight minutes that the sun had stopped radiating its light. Because, as the distance between the earth and the sun, it will take another eight minutes for the last light ray of the sun to reach our earth.

Similarly, when we observe the night sky, we basically see the stars of the past thousands / millions of years in its bosom. None of these stars are present. Many of them may no longer be alive, having died long ago through supernovae.

The above incident has a wide significance in finding intelligent animals in the outside world.

Whether there is an intelligent species like us on any other planet in the universe besides us, it has been wondering to people for decades. Scientists have been searching for life in the outside world for the last several decades.

Many scientists believe that life exists on many other planets in the universe besides us.

But the problem is the same, the barriers to communication with them. Communication can only be done if they are technologically equal to or more advanced than us and want to communicate with us.

However, there are obstacles to ensuring their presence. The finite speed of light.

Suppose aliens like us now live on a planet 90 million light-years from our planet. For their purpose, we sent an electromagnetic signal to our presence from here in 2020.

The signal we send to their planet will reach 90 million years from now.

But during these 90 million years, if for some reason, such as the impact of a large meteorite that wiped out the dinosaurs from the earth 6 million years ago, or if they destroyed themselves with their invented technology or were destroyed by climate change , Then when the signal we send reaches that planet, there will be no one to receive and feed it.

In that case, we might decide that there are no intelligent creatures on the planet. And this is how we come to a false conclusion.

But the fact is that there was a time when animals like us thrived on that planet, modern civilization, cosmopolitan cities were formed, but in the evolution of time today they are lost in the womb of time.

This is one of the reasons why intelligent animals are not found in the outside world