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322 BCE
Aristotle
384-322 A ancient Greek philosopher. He founded his ow school (The lyceum in Athens) Where he spent most of his life teaching and writing. He made contributions to logic, metaphysics, mathematics, physics, biology, botany, ethics, politics, agriculture, medicine, dance and theater. -
168
Ptolemy
100-168 a Greco-Roman mathematician, astronomer, geographer and astrologer. He is the man who considered the Earth the center of the universe. His work that has survived is the Almagest, a series in 13 books. It gives in detail the mathematical theory of the motions of the Sun, Moon, and planets. -
1543
Copernicus
1437-1543 He was a Renaissance mathematician & astronomer who formed a model of the universe that placed the Sun in the center rather than the earth. He created the theory that Earth, spinning on its axis once daily, revolves annually around the Sun. He called this the This is called the heliocentric, or Sun-centered, system. -
Tycho Brahe
1546-1601 He was a Danish nobleman, astronomer, and writer known for his accurate and comprehensive astronomical and planet observations. He worked on measuring and fixing the positions of stars. -
Hans Lippershey
1570-1619 he was a German-Dutch spectacle-maker. He is commonly associated with the invention of the telescope. He discovered the first refracting telescope. -
Johannes Kepler
1571-1630 He was a German astronomer, mathematician, and astrologer. He was best known for his laws of planetary motion. Kepler discovered three major laws of planetary motion. -
Galileo
1564-1642 He was an Italian astronomer, physicist and engineer. He was known as "father of modern physics" "father of the scientific method", and the "father of modern science". His achievements include improvements to the telescope and consequent astronomical observations. -
Giovanni Cassini
1625-1712 Cassini was an Italian mathematician, astronomer and engineer. He is known for his work in the fields of astronomy and engineering. Associated with the first observations of Saturn's moons. -
Sir Issac Newton
1643-1724 He was an English mathematician, physicist, astronomer, theologian, and author. Newton was recognized as one of the most influential scientists of all time. He Discovered gravity.Newton developed the three laws of motion which form the basic principles of modern physics. -
Issac Newton
1643-1724 English mathematician, physicist, astronomer, theologian, and author who is recognized as one of the most influential scientists of all time. Newton developed the three laws of motion which form the basic principles of modern physics. -
William Herschel
1738-1822 He was a British astronomer. Herschel is the founder of sidereal astronomy for observing the heavenly bodies. He found the planet Uranus and its two moons, and formulated a theory of stellar evolution. -
Percival Lowell
1855-1916 Lowell was an American businessman, author, mathematician, and astronomer who fueled speculation that there were canals on Mars. He formed the beginning of the effort that led to the discovery of Pluto 14 years after his death. -
Karl Jansky
1905-1950 He was an American physicist and radio engineer who in August 1931 first discovered radio waves emanating from the Milky Way. And was recognized as one of the founding figures of radio astronomy. He built a radio telescope. -
Edwin Hubble
1889-1953 He was an American astronomer. He played a crucial role in establishing the fields of extra galactic astronomy and observational cosmology. He was recognized as one of the most important astronomers of all time. -
Albert Einstein
1879-1955 He was a theoretical physicist who developed the theory of relativity, one of the two pillars of modern physics. He is also known for its influence on the philosophy of science. -
Sputnik
1957 It was the first artificial Earth satellite. It went into an elliptical low Earth orbit on October 4, 1957, orbiting for three weeks before its batteries died. -
Ejnar Hertzsprung
1873-1967 He was a Danish chemist and astronomer. He developed the Hertzsprung–Russell diagram. HE classified types of stars. -
Yuri Gagarin
1934-1968 He was a cosmonaut. He became the first human to journey into outer space when his spacecraft completed one orbit of the Earth on 12 April 1961. -
The Apollo Program
1963-1972 It was the third United States human spaceflight program carried out by the National Aeronautics and Space Administration. IT succeed on landing the first humans on the moon. And brought them safely back to earth. -
First Space Shuttle Flight
1981 carried out by the National Aeronautics and Space Administration, which accomplished routine transportation for Earth-to-orbit. -
Mars Pathfinder Expedition
1996 It was launched December 4, 1996 and landed on Mars' Ares Vallis on July 4, 1997. It was an American robotic spacecraft that landed a base station with a roving probe. It was a relatively inexpensive mission that tested out many of the technologies build into later missions, like the Mars Exploration rovers Spirit and Opportunity -
Cassini Orbiter
1997 commonly called Cassini, was a collaboration between NASA, the European Space Agency, and the Italian Space Agency to send a probe to study the planet Saturn and its system, including its rings and natural satellites. -
Refracting and Reflecting telescopes
2008 A refracting telescope (also called a refractor) is a type of optical telescope that uses a lens as its objective to form an image. A reflecting telescope (also called a reflector) is a telescope that uses a single or a combination of curved mirrors that reflect light and form an image. -
Neil Armstrong
1930-2012 He is an American astronaut and aeronautical engineer who was the first person to walk on the Moon. He was also a university professor at one point. -
John Glenn
1921-2016 He was a United States Marine Corps aviator, engineer, astronaut, businessman, and politician. He was the first American to orbit the Earth, circling it three times in 1962. Following his retirement from NASA. He became the first American to orbit the Earth. -
Current astronomy event... Worlds largest telescope
2018 At present, the segmented Gran Telescopio Canarias, with a 10.4 meter diameter, is the largest in the world, but two (and potentially three) telescopes will break that record in the coming decade: the 25-meter Giant Magellan Telescope (GMT) and the 39-meter Extremely Large Telescope (ELT).
