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394 BCE
Aristotle
Proved the earth was spherical and the sun,moon,planets,and stars move in different spheres -
Period: 394 BCE to
395 BC-2018
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190 BCE
Hiparchus
Wrote the first star and astronomical catalogue first to become precession of equinoxes and calculated the correct the right distance between the earth and moon -
165 BCE
Ptolemy
He made the Geocentric Theory he also wrote Almagest and made the Ptolemaic Model -
1473
Copernicus
Earth revolves around the sun and said that the sun is the center of the universe -
1546
Tycho Brahe
Most accurate planetary observations before the telescope -
1564
Galileo
he was an Italian scientist that discovered all four of Jupiter's moons Io, Callisto,Europa,Ganymede and Jupiter itself he also agreed with Copernicus along with discovering sunspots -
1570
Hans Lipershey
He created the telescope with a 3x magnification,the patent for it,and eyeglasses -
Refracting Telescope
A revolutionary telescope that uses mirrors to see far away objects -
Johannes Kepler
He made the three laws of planetary motion which say that the planets move around the sun in an ellipse -
Reflecting Telescope
A telescope that reflects light to illuminate the object you are watching -
Giovanni Casini
He discovered the Diurnal Rotation of Venus and separation of Saturn’s rings -
Isaac Newton
Three laws of motion by working off of Copernicus -
William Herschel
Discovered the planet Uranus and its moons. In 1800 he conducted an experiment and discovered IR. -
Percival Lowell
Discovered the planet Puto and studied the “canals” on Mars.Built the Lowell observatory in Flagstaff -
Ejnar Hertzsprung
An inventor of the Hertzsprung Russell diagram which shows the absolute magnitude and the spectral type of star -
Albert Einstein
He was known for the Theory of Relativity -
Edwin Hubble
Using the color of the stars,discovered the universe is expanding which is called hubble’s law -
Karl Jansky
He created the radio telescope and he was the first radio astronomer and he discovered radio waves emanating from the milky way -
Sputnik
It was a Soviet probe that was described as a silver basketball and it was the first manmade object to reach space. -
Yuri Gaganari
1961 He was the first man to go reach space on board 3KA-3 spacecraft -
John Glenn
He was the first man to orbit the earth -
Neil Armstrong
He was the first man on the moon and he made the quote “that is one step for a man and one giant leap for mankind” -
Apollo Missions
The first shuttle in space for research. -
Mars Pathfinder
It was the first successful rover to make it to Mars surface -
Casini orbiter
It was a spacecraft that was named after Giovanni Cassini and was sent to Saturn -
SpaceX Falcon Heavy
A highly anticipated mission that was sent by SpaceX and it is the most powerful rocket yet.