From the ancient times, humanity
always thrived for the understanding of space and its origins. The first
fundamental theory was proposed by Aristotle.
His theory significantly approves
that the earth was spherical in shape as for two reasons. One is the shadow of
the earth on the moon during the eclipse was spherical (i.e, the moment when
the earth is between the sun and the moon).Another one is that the north star
would appear farther from the earth as that observed from the equator(this
happens because If we observe the north star from the equator it would appear
just above the horizon, so it appears closer) this phenomena only happens when
the earth is in spherical in shape. The Greeks approved his hypothetical theory
based on the visual observances and concluded that the earth was spherical.
Aristotle also believed that the earth was situated at the centre of the galaxy
and all the other planets and natural satellites revolved around the earth. He
believed that the earth was the centre of the galaxy for some mythical reasons.
This idea was later visually represented by Ptolemy.
Copernicus was the first person to
introduce the heliocentric theory which opposed the justifications of all the
planetary bodies revolving around the earth. Heavenly bodies revolve around the
sun except stars that were fixed in their axis far far away just like our sun.
He circulated his theory anonymously, because he would be punished, as the
church adopted the theory of Aristotle because it resembles the religious
writings and they also believed there was enough space for Hell and heaven.
"Religion and their understanding of
god is creator of all somewhat slowed down the thrive of curiosity and
understanding,hasn’t it"?
Almost a century later, Johannes
kepler and Galileo galilei approved the
Copernican theory and started to support
it. They justified the theory by visual understanding of the theory since
telescope was just invented at that time!. Kepler modified the theory by telling
that the planets revolved around the sun in elliptical orbits rather than
circular.He worked out the math and gave a fundamental knowledge on the motion
of the planets.
Later in the time of sir Isaac newton, published
a book called “philosophiae
naturalis principia mathematica” one of the most extraordinary works in physical sciences. He created the
necessary math to calculate orbits and introduced the concept of gravity and
the universal law of gravitation was thus born.His law states that force is directly proportional to the mass of the body and in the case of two masses the force is inversely proportional to the square of the distances between them.
Nice boi
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