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It was built in 3000 B.C. in England, Europe. The rocks were thought of being used by many things. People thought they were used for ceremonies or for aliens to land there. It was used as a Late Neolithic burial site. Astronomers on the other hand used the giant pilers to predict eclipse and seasons.

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Hipparchus was born on 190 BC in Nicaea in Turkey. He was a Greek astronomer, geographer, and mathematician.  He’s considered the founder of trigonometry but is most famous for his incidental discovery of procession of the equinoxes. With his solar and lunar theories and his trigonometry, he may have been the first to develop a reliable method to predict solar eclipse. little of his work survives, but Ptolemy considered him his most important predecessor. He then passed away in 120 BC.

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Ptolemy was born in Egypt on 100 AD. He was a Greek mathematician, astronomer, geographer, and astrologer. He stated that the "Ptolemaic system" was that the planet earth was the center of the universe. He would also record longitudes and latitudes in degrees almost 8000 locations in his world map. Ptolemy is one of the most accurate Greeks that tried to explain planetary motion.

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Nicolaus Copernicus was born in Poland in 1473. Copernicus was a astronomer. He was mostly known for establishing the concept of a heliocentric in where the sun instead of earth is the center of the solar system.  Copernicus also established that the planets orbited the sun rather than the earth. He laid out his model of the solar system and the path of the planets.

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Galileo was born in Italy on 1564. Galileo was the first person to look at the moon through the telescope and made his first astronomy discovery. Galileo was a Italian astronomer, physicist, and engineer. Galileo is best known for the discovery of the 4 most famous moons of Jupiter which are known for the "Galileo mounds" Galileo then published his work and came out publicly in support of the heliocentric model of the solar system which put him behind bars for a long time.

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The first ever telescope was patented in 1608 by Hans Lippershey. Most of the people thought that Galileo had invented the telescope but Galileo made his own but not invented it. Lippershey was German-Dutch glass maker and what he managed to do was reduce light from the telescope when focusing it. The invention of the telescope played an important role in advancing our understanding of Earths place in the cosmos

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Galileo Galilei | The inventor of telescope | History | CBSE |

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Brahe was born in Denmark on 1564. He studied astrology, alchemy, and medicine. He was a nobleman, astronomer and writer he was well known for his accurate and comprehensive astronomical observations. Brahe also kept good records of what he would see or discover such as stars, planets and other astronomical events including a comet and a supernova. Most of his observations were before the telescope come into play he observed with his astronomical instruments he had.

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Kepler was born in Germany on 1571. Kepler was a German astronomer, mathematician, and astrologer.  Kepler was well known for his 3 Kepler laws of planetary motion. Planets moved in orbits shaped like and ellipse a line between a planet and the sun covers equal areas in equal times. He was the first to determine that refraction drives vision in the eye, and that using two eyes enables depth perception. He used Brahe's notes to find a more simple description of planetary moon.

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Sir Isaac Newton PRS was an English mathematician, physicist, astronomer, theologian, and author who is widely recognized as one of the most influential scientists of all time and as a key figure in the scientific revolution. 1643- 1727. Discovered gravity and the law of universal gravitation

Acceleration due to gravity g=9.81 m/s^2

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Albert Einstein was born on March 14th 1879. He was a German-born theoretical physicist who developed the theory of relativity, one of the two pillars of modern physics. His work is also known for its influence on the philosophy of science. As a physicist, Einstein had many discoveries, but he is perhaps best known for his theory of relativity and the equation E=MC2, which foreshadowed the development of atomic power and the atomic bomb.

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Stephen William Hawking CH CBE FRS FRSA was born on January 8th 1942. He was an English theoretical physicist, cosmologist, and author who was director of research at the Centre for Theoretical Cosmology at the University of Cambridge at the time of his death.He predicted   the existence of black holes and noted that they emit hawking radiation

Hawking radiation – electromagnetic radiation emitted by a black hole, due to quantum effects, causing it to lose matter. If a black hole loses more matter than it gain, it could shrink and eventually vanish