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322 BCE
Aristotle
He was born and died during Greek times. he proved that the earth was cervical -
120 BCE
Hipparchus
Calculated the length of a year.came up with distance between the Earth and the moon -
170
Ptolemy
Born 100 AD and he died 170 AD he was a astronomy and he believed that earth was in the middle of space -
1543
Copernicus
Born 1473 and Died 1543 He created the a diagram where the sun was in the middle of space -
Tycho Brahe
Born 1546 Died 1601 accurate most precise instruments -
Hans Lippershey
Born 1570 Died 1619 Invented the telescope. 3x the telescope -
Johannes Kepler
Born 1571 Died 1630.He was Tycho’s assistant. He discovered that the orbit of the planets are not circular but elliptical (oval). -
Galileo
Born 1564 Died 1642 He discovered the first four moons Europa,Io,Ganymede and Callisto of Jupiter And born in Italy.He has evidence of the first telescope -
Giovanni Cassini
Born 1625 Died 1712 Italian who discovered the four moons of Saturn and he determined the distance from the Earth to the moon -
Sir Isaac Newton
Born 1642 Died 1727 Further developed works of copernicus and kepler using math.Invented reflecting telescope 1668. 3 laws of motion -
William Herschel
Born 1738 Died 1822 Discovered the planet Uranus and he discovered saturn's moons.In 1800, Herschel performed a simple experiment determining the temperature of the different colors of sunlight passed through a prism. he noticed the region the visible spectrum, and used his measurements to deduce the presence of what is now known to be infrared radiation -
Percival Lowell
Born 1855 Born 1916 discovered the planet Pluto and studied the “canals”on mars.Built the Lowell observatory in Flagstaff,AZ to study Mars -
Karl Jansky
Born 1905 Died 1950 Discovered the radio waves are emanating from space. -
Edwin Hubble
Born 1889 Died 1953 He used the color of the stars to figure out that the universe is expanding -
Albert Einstein
Born 1879 Died 1955 Theory of Relativity (1905) and gravitation -
Sputnik
Sputnik was a accomplish for the U.S. because the U.S. beat Russia this time -
Yuri Gagarin
First human to orbit Earth -
Period: to
The Apollo program
The Apollo was the third United States human spaceflight program carried out by the national Aeronautics and space administration and it accomplished landing the first humans on the moon -
Ejnar Hertzsprung
Born 1873 Died 1967 Hr Diagram and magnitude means color -
Neil Armstrong
Born 1921 Died 2012 He was U.S. person to walk on the moon and he walked on the moon in 1969 -
John Glenn
Born 1921 Died 2016 1st U.S. Citizen to orbit Earth
