Kepler did multiple things, but his most famous work is demonstrating that the planets move in an elliptical (kind of like an oval) orbit around the sun instead of a circular orbit.
Answer:The Middle Ages, or Medieval Times, in Europe was a long period of history from 500 AD to 1500 AD. That's 1000 years! It covers the time from the fall of the Roman Empire to the rise of the Ottoman Empire. This was a time of castles and peasants, guilds and monasteries, cathedrals and crusades.Great leaders such as Joan of Arc and Charlemagne were part of the Middle Ages as well as major events such as the Black Plague and the rise of Islam. Notre Dame by Adrian Pingstone Middle Ages, Medieval Times, Dark Ages: What's the Difference? When people use the terms Medieval Times, Middle Ages, and Dark Ages they are generally referring to the same period of time. The Dark Ages is usually referring to the first half of the Middle Ages from 500 to 1000 AD. After the fall of the Roman Empire, a lot of the Roman culture and knowledge was lost. This included art, technology, engineering, and history. Historians know a lot about Europe during the Roman Empire because the Romans kept excellent records of all that happened. However, the time after the Romans is "dark" to historians because there was no central government recording events. This is why historians call this time the Dark Ages. Although the term Middle Ages covers the years between 500 and 1500 throughout the world, this timeline is based on events specifically in Europe during that time. Go here to learn about the Islamic Empire during the Middle Ages.
French Revolution such as the idea of "liberty, equality, fraternity" and justified French expansionism and French military campaigns on the claim that France had the right to spread the enlightened ideals of the French Revolution across Europe
Robert Boyle wrote and published "The Sceptical Chymist: or Chymico-Physical Doubts & Paradoxes" in 1661. Sir Isaac Newton wrote many works but could be best remembered for "The Principia: Mathematical Principles of Natural Philosophy" in 1726. Both of these works could be considered the beginning of the scientific revolution (though I do not believe that either Boyle or Newton would want "revolution" term used in later discoveries as a result of their work.)
