aryankhera

[aryankhera]

Era of Misconception

It was all blank, but we don’t know was it really or it’s just our perspective because it was uncharted. Some used to utter that, there was nothing before it, as time never existed before, but we think that it’s a way to decline the beauty of universe. Many people say that it was empty and tranquil, but it was holding the rage of heaven. We were not knowing what was before it and what there will be in future as a quantum particle but there occurred an explosion, an explosion which changed everything. ‘BIG BANG’!!!

     It was the age of classical antiquity, around 350 BCE. When Aristotle, a Greek philosopher wrote his book ‘On the Heavens’ which changed the way human used. In that book, he was able to put two hypotheses in front of world regarding cosmos.

First, according to his geocentric model there was only 55 objects in the universe. He mentioned that the earth was laid in the centre of universe and other planets revolve around it in a respective line: Moon, mercury, Venus, Sun, Mars, Jupiter and Saturn. past Saturn, stars were in a stationary position. At that time, stars were thought as the end of the spiritual space of mankind, where person can never go.

Secondly, he believes that Earth had always existed in his eternal or immoral state. He postulated this in his theory of ‘how the Earth was created and how the universe is laid out’. According to his understanding, the Earth was unalterable and provide an exact circular motion for the other bodies revolving around. He also tried to manipulate era that Earth is spherical in shape with a strong proof of shadow on moon during moon eclipse.

He states that when moon eclipses, the shadow is always convex. If the eclipses are due to the interposition of the earth, the shape must be caused by its circumference.

At the same time, when it was the age of prospering the universe beyond the human mind, the age of Aristarchus another Greek mathematician and astronomer, who came up with a revolutionary astronomical hypothesis. He proposed the idea of ‘heliocentric model of the universe’, according to which Sun lies at the centre of our universe and other celestial bodies including earth revolves around it in a circular orbit.

He also mentioned that the stars were distant suns that remained unmoved. But his theory was not taken under consideration by the Greek astronomers. Ancient philosophers denied the theory due to fact taken under consideration that If the Earth is rotating about its axis, and orbiting around the Sun, then the Earth must be in motion. However, we cannot feel this motion. Nor does this motion give rise to any obvious observational consequences. Hence, the Earth must be stationary.

           "Aristarchus’s heliocentric model of the universe was rejected" .

 Geocentric theory became the accepted approach through generations. But this model of the universe had trouble explaining some planetary phenomena. So, it was later elaborated by Ptolemy around 150 A.D. The most prominent and conspicuous problem was of retrograde motion. Retrograde motion posses a very unique manoeuvre, each planet after a regular sudden point of time, slows down and then retrograde(reverse).

 Also, they noticed that planet seemed to grow brighter or dimmer while they move in night sky. Aristotle model of universe doesn’t seem to account for any of the phenomena. Claudius Ptolemy expostulate that planets move on two sets of circles at the same time: a deferent and on epicycle. This theory satisfied the retrograde motion while keeping the planets on their respective circular orbits.     

            Ptolemy used the device of an epicycle to explain the non-uniform motion. With an epicycle the planet orbits the Earth but is offset on its own circle within a circle known as deferent. Both circles rotate clockwise and are roughly parallel to the plane of the Sun's orbit (ecliptic). This epicyclic motion was able to explain the non-uniform angular motion of the planets at the expanse of increasing complexity of the geocentric model.  

Ptolemy’s model provided a reasonably accurate system for predicting the positions of heavenly bodies in the sky. But in order to predict these positions correctly, Ptolemy had to make an assumption that the moon followed a path that sometimes brought it twice as close to the Earth as at other times. And that meant that the moon had sometimes to appear twice as big as it usually does. Ptolemy was aware of this flaw but nevertheless his model was generally, although not universally, accepted. It was adopted by the Christian church as the picture of the universe that was in accordance with Scripture. It had the great advantage that it left lots of room outside the sphere of fixed stars for heaven and hell.

       “ The time for golden era of physics and astronomy was now to start! ”

[aryankhera]

“The happiness of your life depends upon the quality of your thoughts.” Marcus Aurelius. ❤❤So here is another quote made by me. ❤❤

😉😉ENJOY AND INSPIRE😉😉