In ancient civilizations it was believed that the Earth was the center of the Universe (Geocentric model). This was the accepted belief at the time. Many philosophers and scientists wrote works based on the
Geocentric model.
The understanding that the Earth being the center of the universe began to change as scientists (Copernicus, Galileo and Kepler) researched, used mathematics and physics. The findings of there work led to the belief that the Sun was the center of the Universe (Heliocentric model).
Copernicus used mathematics (On the
Revolutions of the Celestial Spheres) to form the Heliocentric model of the universe. Galileo used physics (Dialogue
Concerning the Two Chief World
Systems) to support Copernicus’
Heliocentric theory.
Kepler mathematics (laws of planetary motion) and his expertise in optics
(inventing an improved version of the refracting telescope (Keplerian
Telescope) and gave credit to Galileo for his telescopic discoveries) to support the Heliocentric model.
The Heliocentric model was accepted as the structure of the Solar System because of the work of these ancient scientists and the work of those that came after them.
In the mid-to-late 20th century supremacy in space exploration between the Soviet Union and
United States began. This is now known as the “Space Race”.
During this tense time known as the
“Cold War” both the Soviet Union and the United States felt that being first in space exploration was necessary for national security and a symbol of their superiority.
The Space Race let to the launching of artificial satellites and the race to put a manned spacecraft on the
Moon.
On July 20, 1969 the United States landed the first humans on the
Moon. This accomplishment effectively ended the Space Race.
The Space Race resulted in increased spending in research and education; resulting in great scientific advancements
and