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Ptolemy: The Solar System
Ptolemy's theory was that the Sun, planets and the distant stars moved around the Earth. To the Greeks, the circle represented perfection, and Ptolemy thought the moon, the sun, and the stars moved in circles too. Since the motion was not exactly the same, he said that the center of these circles was some distance away from the Earth. -
Jan 1, 1220
Robert Bacon: Led to the Future
Robert Bacon didn't make any major discoveries, but he founded the gunpowder which led to many great invetions in the future. He was also an advocate of the scientific revolution. -
Feb 19, 1543
Nicolaus Copernicus: Heliocentric Model
Copernicus published a book, is often regarded as the starting point of modern astronomy and the defining epiphany that began the scientific revolution.His heliocentric model, had the Sun at the center of the universe, which demonstrated that you don't need the Earth to be in the center for everything to move right. His work started further scientific investigations, becoming a landmark in the history of science that is often referred to as the Copernic Revolution. -
Nov 18, 1570
Tycho Brahe: Detailed Astronomical Observations
Tycho was known for his accurate and comprehensive astronomical and planetary observations. In his De nova stella of 1573, he destroyed the theory of the celestial spheres with precision measurements that showed the celestial heavens were not immutable but by the lack of parallax, new stars, were not "atmospheric" tail-less comets but occurred above the atmosphere and moon. -
William Gilbert: Earth's Magnetic Field
He known by some to be the father of electrical engineering or electricity and magnetism. He made the discovery of the Earth's magnetic field. Gilbert's magnetism was the invisible force that many other natural philosophers, came upon, incorrectly, as governing the motions that they observed. -
Johannes Kepler: First Two Laws of Planetary Motion
He is best known for his eponymous laws of planetary motion, codified by later astronomers. His works also provided one of the foundations for Isaac Newton's theory of universal gravitation. He also did fundamental work in the field of optics, invented an improved version of the refracting telescope, and mentioned the telescopic discoveries of his contemporary Galileo Galilei. -
Galileo Galilei: Telescopic Observations
He was a great astronomer and physicist who, among his many achievements, was the first to make and publish systematic telescopic observations of the Moon, planets, and stars.At the start of 1610, Galileo discovered the four big moons of Jupiter, the phases of Venus, the mountains of the Moon, and the starry nature of the Milky Way. Galileo went on to make a number of telescopes -
Isaac Newton: Laws of Motion
Newton built the first practical reflecting telescope and developed a theory of colour based. He also formulated an empirical law of cooling and studied the speed of sound. One of his most famous achievements was the three laws of motion and gravity. -
Aristotle: "Natural Philosophy"
Aristotle is one of the most important figures in Western philosophy.In Aristotle's, "natural philosophy" is a branch of philosophy examining the natural world, which now includes fields of physics, biology and other natural sciences. In modern times, his philosophy inquires logic. Today's philosophy tends to exclude empirical study of the natural world and use the scientific method.