Scientific developments in the early centuries were started by Galileo and Aristotle. The Galileo’s scientific contribution to this world is helping today’s modern science. Galileo’s contribution to the scientific world starts with heliocentric theory. One of the most famous inventions of Galileo is the “Heliocentric Model of the Solar System”. Galileo proposed and proved the concept demonstrated by Nicolas Copernicus. Nicolas Copernicus proposed a theory, which says that the sun is at the center of our solar system and the entire planets move around the sun. Heliocentric theory is considered the great contributions to modern science. Galileo designed the first telescope with the magnification rate of x3 to x30. Galileo’s one of the biggest contribution lies on gravity, Yes, Galileo disagreed a gravity theory proposed by Aristotle. Aristotle proposed that the objects having different mass fall at different rates, it was completely disagreed with Galileo. In 1589 Galileo conducted an experiment to test gravity by dropping a light weighted feather and heavy weighted ball from the tower of Pisa, he observed the experiment and concluded that the objects having different mass fall at the same rate in the state of vacuum, the presence of air in our atmosphere makes the objects of different mass to fall on different rates. Galileo theory was tested by Neil Armstrong during Apollo 15 launch; after reaching the moon, Armstrong dropped a feather and a hammer from the same height and he noticed that the two objects fall on the ground at the same rate. The moon does not possess any air (atmosphere), since the moon has no atmosphere which makes the objects to fall at the same rate, and the Galileo theory of gravity have been declared as scientifically correct. In 1609 Galileo designed his own telescope to see the outer space more accurately and he found the dark spots on the outer surface of the sun.
References
1. “List of Galileo Inventions”, eHow,Web. http://www.ehow.com/facts_5491727_list-galileos-inventions.html, 21 Jan 2014.
2. “Galileo’s learning tower of pisa”, Wikipedia, 19 Jan 2013. Web. http://en.wikipedia.org/wiki/Galileo's_Leaning_Tower_of_Pisa_experiment. 21 Jan 2014
