Constellations Thesis Book by Nesrin Zidan
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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.