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Constellations Thesis Book by Nesrin Zidan

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126

The most impactful design of a

telescope, however, is Galileo’s newly developed

telescope, which was used to make

some amazing astronomical discoveries,

such as witnessing the revolving moon

system of Jupiter and realizing there were

certainly celestial objects that didn’t circle

the Earth. It was created around the year

1609 A.D. Galileo came into direct dispute

with the influential church because of his

efforts to defend the heliocentric theory of

the cosmos. He was compelled to repent

after being found guilty of heresy in 1632

A.D, and he was sentenced to house arrest

for the remainder of his life (Miller, 2013).

Western civilizations ultimately

caught up to their Middle Eastern counterparts.

The Enlightenment period witnessed

further advancements where astronomical

understanding flourished. Sir

Isaac Newton created the first reflecting

telescope in 1668 AD, which looked farther

into space by using a curved mirror

rather than a lens. Later, Newton releases

his incredibly famous work, “Philosophiae

Naturalis Principia Mathematica,” in

which he affirms that the Earth revolves

around the Sun and provides an explanation

for the three Kepler laws. The law of

universal gravitation, which he also develops,

ushered in a new era of physics and

enlightenment. In the field of cosmology,

Messier also finds and records a large

number of galaxies, nebulae, and star clusters

in 1781 A.D. The study of the galaxy

has broadened and mind-boggling theories

such as the Black Hole Theory were

proposed in 1798 A.D by Laplace (Miller,

2013).

As we approach the 19th and 20th

centuries, the dream of touching the stars

is becoming more tangible. This period

marks the shift from theoretical studies

toward outer space exploration. We cannot

discuss the theories about space without

bringing up Albert Einstein’s Special

Theory of Relativity, which introduces us

to the relationship between space and time

in 1905 A.D, then in 1916 his General

Theory of Relativity, which discusses gravitational

force. In studying the galaxies, in

outer space, Edwin Hubble, who worked

at Mount Wilson Observatory and used a

60-inch reflector telescope to examine the

galaxies in space, demonstrated in 1923

A.D. that galaxies are different systems

from our own Milky Way and that the universe

was expanding.

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