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384 BCE
Aristole
(384BC-322BC) Proved Earth was spherical, along with the Sun, Moon and Planets. Believed Earth was attached to an invisible shell and Moon. -
220 BCE
Mariners Astrolabe
Inclinometer to determine the latitude of a ship by measuring the Sun's noon altitude of a star. -
190 BCE
Hipparchus
(190BC-120BC) Discovery of the precession of the equinox. Created one of the first star catalog. Also calculated distance between Sun, Moon, and Earth. -
100
Ptolemy
(100AD-120AD) Earth is at center, under the geocentric model, Sun, Moon, stars, and planets. They all orbit Earth. -
1473
Copernicus
(1473-1543) Heliocentric model, the Sun is to lie in the center, while Earth and other planets revolved around it. Also came up with the scientific method steps. -
1546
Tycho Brahe
(1546-1601) He is known for his observations. Had most comprehensive and accurate space timing. -
1564
Galileo
(1564-1642) He discovered Sun spots. Proved stars are not fix to invisible shells. Proved everything doesn't revolve around Earth. Also proved other things revolved around other planets. -
1570
Hans Lippershey
(1571-1619) 3X more manification. Associated with the telescope. -
1571
Johannes Kepler
(1571-1630) was a German mathematician motion. -
Refracting Telescope
First developed in 1608. An optical telescope that uses a lens as its objective to form an image. -
Giovanni Cassini
(1625-1712) Was a French astronomer discovered the Cassini Division, the dark gap between the rings A and B of Saturn. He also discovered the 4 Saturn's Moons. -
Sir Isaac Newton
(1643-1727) Recognized as one of the most influential scientists of all time. Also helped develop the infinitesimal calculus. -
Relecting telescope
Was invented in 1668. A small telescope that is generally considered by professional astronomers to be any reflector-type telescope with a primary mirror of less than 2 meters diameter. -
William Herschel
(1738-1822) Was a British astronomer, the Founder of Sidereal astronomy of the systematic observation of the heavens. -
Percival Lowell
(1855-1916) Was an American astronomer who predicted the existence of a planet beyond the orbit of Neptune and initiated the search that ended in discovery of Pluto. -
Ejnar Hertzsprung
(1873-1967) Was a Danish astronomer who developed the Hertzsprung-Russell diagram. -
Albert Einstein
(1879-1955) Was a German physicists who made a theory of relativity and gravitation. -
Edwin Hubble
(1889-1953) Was an American Astronomer who discovered colors of the stars and discovered the universe is expanding and his theory was based on the Big Bang Theory. -
Karl Jansky
(1905-1950) Discovered the radio waves are emanating from space. -
John Glenn
(1921-2016) First man to walk on the moon. Also became the first American to orbit the Earth 3 times. -
Neil Armstrong
(1930-2012) First man to walk on the moon. -
Sputnik
(1954) Was the first artificial Earth satellite and it was launched to low Earth orbit. -
Mars Pathfinder Expedition
(1956) It was designed as a technology demonstration of a new way to deliver an instrumental lander and the first-ever robotic rover to the surface of the red planet. Also returned on unprecedented amount of data and outlived its primary design. -
Yuri Gagarin
(1961) First human (Soviet) to orbit Earth. -
Apollo Mission
(1963-1975) Get humans on moon and get them back. -
First Space Shuttle Flight
(1981) Was the fourth human spaceflight program carried out by the national aeronautics and the space administration which transported Earth's orbit crew. -
Cassini Orbiter
(1997-2017) 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. -
SpaceX Falcon Heavy
(2018) Increases the low Earth maximum. Based on Fuselage and engines of the Falcon Heavy design.
