Galileo's Telescope
Copernican System
This is a photograph of the telescope that was made by Galileo Galilei in 1610. Galileo is a very famous astronomer who made very great discoveries and one of his greatest inventions was the telescope. After he designed and built it he went to Rome to lecture and demonstrate it. With this new device Galileo discovered that the moon was not smooth and had many craters and mountains on it, also he found out that Jupiter had four moons. He also found out that the phases of Venus could not be explained correctly within the traditional Earth-centered model of the Universe. It is housed at the Institute and Museum of the History of Science in Florence, Italy.

This is a big social impact because it is much different than anything anyone had ever seen back then. It showed that the moon that people always thought was smooth really had lots of craters and mountains. It was also a big economic impact because when it first came out no one was sure they should buy it but then it started getting way more popular because it was a much easier way to look at the stars and the different planets and for astronomers this was very important and they really started to buy them.
This picture depicts a sun that is at the center of the universe. As the planets rotate around the sun at the center. This was the heliocentric theory that was proposed in the 16th century. The heliocentric theory was the idea that the Sun not the Earth is the center of the universe. This theory was proposed by Nicholas Copernicus. Nicholas Copernicus was a Polish astronomer who ignited the scientific revolution and created a serious rift between science and religion. He proposed that it was the sun that stayed where it was while the Earth, along with the moon and other planets, revolved around it.

This was a very big social impact because now people had to change what they had believed for so long. This was a very different theory from the geocentric theory where the earth was the center of the universe instead of the sun. So now people had to change what they thought about the earth, sun and even the universe.