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384 BCE
Aristotle
Aristotle was a Greek philosopher from 384-322 Bce. He was most know for because of his theory, which was the sun revolved around the earth. He was one of the greatest political thinkers, he created one of his own schools in Athens .He also proved Earth was spherical . -
100 BCE
Ptolemy
Ptolemy wrote the Almagest a set of astronomy manuals which catalouges the stars, eclipses and the movement of the sun and the moon . His model is the geometric theory and also called the Ptolemaic Model. He relied on Hipparchus astronomy work for the star catalog -
1473
Copernicus
Read Ptolomey's Almagest and proposed Copernican Heliocentricisim. The sun is the center of the universe with the planets rotating around it. -
1546
Tycho Brahe
He spent 20 years of his life taking the most precise measurments of the movements of the stars and planets. -
1564
Galileo
Galileo used a refracting telescope to prove that not all things revolved around the earth . Which Disapproved the ptolemaic and geocentric models. He also discovered the 4 Jupiter moons. -
1570
Hans Lippershey
He was a lens maker from Germany but moved to the Netherlands. He was the first to apply for a patent fir the 3X scope. -
1571
Johannes Kepler
He was Tycho Brahes assistsant . He discovered that the orbit of the planets are not cirular -
Giovanni cassini
A itatlian the division of rings in saturn. 4 of saturns moons and the rotation of mars -
Giovanni Cassini
A Italian who discovered the divison of rings on saturn. 4 of Saturns moons, and the rotation of mars and jupiter -
Sir Issac Newton
He further devoloped works of copernicius and kepler using math. He also created the reflecting telescope -
Sir Issac Newton
He further devoleped works of Copernicuis and Kepler using math. He invented the reflecting telescope. -
William Herschel
Discovered the planet Uranus and its moon. He also discovered 2 more of saturns moons. He belived to of found polar ice on mars leading to hopes to find water on Mars. -
Percival Lowell
Discovered the planet pluto and studied the canalis on Mars. Built the Lowell Observatory in Arizona. -
Ejnar Hertzsprung
On of the inventors of the Hertz sprung diagram. The diagram shows the corellation between temperature, absolute magnitude and the spectral type of star. He discovered the 1627 asteriod. -
Albert Einstein
Theory of relativity and gravitation -
Edwin Hubble
Using the color of the stars, he discovered the universe expanding. Hubbles law , was galaxies are moving away from each other. The idea is the basis of the big bang theory. -
Karl Jansky
He discovered the radio waves are emanating from space. Radio waves are the longest type of energy -
John Glenn
John glenn was the first American to orbit the earth. He did this in 1962 -
John Glenn
Was the first American to orbit the earth In 1962 -
Neil armstrong
Neil was the first Person to walk on the moon -
Sputnik
Oct 4 1957 the importance of sputnik to the U.S in the midst of the cold war, Russia was successful in launching the first satlelite into space. -
Yuri Gagarin
Yuri was the first human to orbit earth -
The Appolo program
the Appolo program was the third United States human spaceflight program -
First space shuttle flight
STS-1 was the first orbital spaceflight of NASA's Space Shuttle program. The first orbiter, Columbia, launched on 12 April 1981 -
Mars Path finder expedition
the Mars path finder was designed as a technology demonstration of a new way to deliver an instrumented lander and the first-ever robotic rover to the surface of Mars -
Cassini orbiter
the cassini orbiter was a collaboration between NASA, the European Space Agency, and the Italian Space Agency to send a probe to study the planet Saturn.
