In a very busy life full of
Work pressure
Family tensions
A person with mind full of chaos
Looks into the sky from his balcony
Seeing the stars and the moon
How small are we in this universe?
How tiny are our problems?
Thinking so,
In such a vast universe
Are we alone?
His brain raced with many such questions
Along with him
Let all of us take a look at the universe
No rocket or a space ship is needed
Just keep away all the tensions of your life
And take a look at the night sky
Far behind the visible moon and stars
The sky has hidden many more wonders and questions
When did the universe begin
Are we really alone?
Is extraterrestrial life there?
How to know it?
Many of such questions have drived humans right from the start
Universe consists of about 100 billion galaxies
Each galaxy is made of 100 billion stars atleast
This accounts to a total of 10^22 planets
Despite many planets and stars
Even if your are thrown randomly into the outerspace
The chance of you landing on a planetary system is less than 1/10^33
Now think how huge is the universe
Universe is a complex yet ordered form
This is cosmos
All the star systems in the universe
Are islands in a ocean of void space
Each star system is separated by many light years
In such a huge universe
In a galaxy called the milky way
Sun, a star of very ordinary size
Has our planet Earth in its solar system
So we are not even a drop in this huge cosmic ocean
How much we really know about the universe?
And even if we know something how did we know it?
Does this universe have a beginning ?
If yes, what happened before the beginning?
To answer many of such questions
Here comes the series COSMOS
To be a part of this journey
Subscribe to our channel and tap the bell icon
Every Wednesday at 6:30pm we will comeup with a new episode
To tell you man astonishing things about this universe
To understand when humans started searching for answers about the universe
We have to go back to 3rd century BC
It is the first time when many scientific discoveries were made about the earth
Even before this period also
many theories were told but none of them were scientific
During those times in Alexnadria, Egypt
An astronomer named Eratosthenes lived
Once he started reading some lines in a book written by his ancestors
At 12 o clock on 21st June
In a city named Syene no shadows were formed
Syene is located southwards to Alexandria
As per those old books
Eratosthenes wondered if shadows won't form in Alexandria too
At the time and date mentioned in the books
He stood along with a stick
But he observerd that a shadow was formed at an angle of 7.2 degrees
Observing this
In Alexandria and Syene
Same sun rays at the same times gave shadow at one place but none at the other
So he understood that the earth’s surface is curved
This was already told by Aristotle in 340 bc with eclipse as a proof
Even before him
Pythagoras and many other Greek philosophers have mentioned the same thing
But with this experiment Eratosthenes made a great discovery
In Alexandria a shadow is formed at an angle of 7.2 degrees
In syene no shadow was formed
This meant that on earth’s 360 degree surface
Both the cities are at 7.2 degrees
After this
He told a boy to measure the distance between both the cities
It was about 800kms
Later with a simple calculation
He told that the circumference of earth is 40000 km
In 20th century
Rockets were sent into space to calculate the circumference of earth as 40030kms
But before 2200 years itself
He calculated earths circumference just with a stick
With his amazing discovery
Many people have dared to sail around the seas
They travelled only with the positions of sun, moon and stars
Keeping this aside
Many theories have started coming about the place of earth in this universe
In 340 BC
Aristotle told that earth is in the centre and sun, moon and other stars revolved around it
This was all told by him as a philosopher without any experiments
Then in 2nd century AD
A scientist named Ptolemy proposed a model based upon aristotle’s theory
This was all based upon on religious sculptures of the Christians
With this, many people supported this idea
And they started spreading it to many more
After many centuries in 1514
A polish priest Nicholas Copernicus proposed a new solar system model
But he feared that the model is against to everybody’s believes
So he published the model anonymously
As per this
Sun is at the centre with all other planets revolving it
This model was supported by Kepler and galileo
Galelio is one of the most important people for advancement in modern science
So he is called as the father of modern sciences
He opposed everyone
And even risked his life to tell truth to the future generations
He understood that the Copernicus solar system theory is correct
He wanted to take it into the public
But until then
Many church officials only propagated aristotles theory
Linking it with the religious beliefs
But now if it is revealed to be wrong
People might lose faith in religion
So many tried to stop galileo
His books were suppressed
But he was desparate to let the public know the truth
He roamed across many countries chanting the truth
In 1609
Galileo discovered a telescope and observed the moons of Jupiter revolving around it
He did many of such experiments to know the laws of universe
After a few years in 1623
Galileo came to know that his friend became a pope
He took his permission and wrote a book
Stating the differences between Aristotle and Copernicus theories
Officials identified the book to be against their religious beliefs
Officials along with Aristotle followers banned the book
Galileo was house arrested for his life time
Even 4 years prior to his death
Despite being house arrested
He wrote a book called the two new sciences and sent it to a publisher
Even in his final days
He tried to send scientific knowledge into the people
In 1642, galileo passed away
After his death, in the same year
A great scientist who brought a new dimension to our understanding of the universe was born
Who is he?
And what did he achieve in knowing the secrets of the cosmos?
To know this don’t miss COSMOS episode 2 that will be coming up at 6:30pm on next Wednesday
The episode is going to be more interesting and exciting
so don’t miss it
That's all for today people
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