Galileo Galilee was an Italian Astronomer, Philosopher, Mathematician and Physicist. He was born in 1564 in Pisa, Italy and died in 1642 in Arcetri, Italy. During his life Galileo wrote many publications such as ‘Letter to Castelli’ and ‘Dialogue concerning the two chief world systems’ where he outlined his views on natural philosophy, theology and the composure of the solar system. Galileo stated his support for the Copernican design of the Solar System, in his text ‘Sidereus Nuncius’ or ‘The Starry Messenger’. Galileo developed a theory in regards to two objects falling on earth. In an Aristotelian view the heavier objects being solid would fall to earth at a faster rate than lighter objects as they were like earth and therefore would fall to earth so as to return to it’s natural place. However Galileo was able to prove his theory that all objects accelerate at the same rate, regardless of size or mass. He proved this by his thought experiments with balls with varying weight on an incline. He distinguished that the balls if unaffected by friction and other external effects, would roll down the incline its velocity would increase, it would have a lower velocity rolling up an incline and would continuously move on a perfectly flat surface at a constant velocity. This would serve as the basis for Sir Isaac Newton’s first law of motion, Inertia. This law states that every object will remain in it’s state of motion unless affected by an external force, which is an easier to comprehend version of what Galileo was trying to prove. Johannes Kepler was a German Astronomer and Mathematician. He was born in 1571, in Weil der Stadt, Germany and died in 1630 in Regensburg, Germany. …show more content…
Kepler’s second law stated “The line joining the planet to the Sun sweeps out equal areas in equal times as the planet travels around the ellipse.” This explained why the planets would appear to move faster at times. Kepler’s final law stated, “The ratio of the squares of the revolutionary periods for two planets is equal to the ratio of the cubes of their semi major axes.” This law explained why planets have varying orbits, such as Mercury having an orbit of 88 days, whereas Pluto had an orbit of 248 years. Newton was able to extract this into his second law; Acceleration is produced when a force acts on a mass. The greater the mass the greater the amount of force needed. When gravity is applied to Kepler’s second law, it implies that ha planets obey the same laws of motion as bodies on earth. However unlike Galileo and Descartes, Kepler was not a ‘Mechanical Philosopher.’ Mechanical Philosophers believe that all objects were composed of particles, which interacted with accordance to natural