-
384 BCE
Aristotle
Aristotle made the geocentric universe. -
100
Ptolemy
Ptolemy supported a geocentric universe. -
1473
Copernicus
He made the earth we know today. -
Dec 14, 1546
Tycho Brahe
He helped the geocentric universe. -
Feb 15, 1564
Galileo
He improved telescopes and was the first to see craters on the moon. -
1570
Hans Lippershey
Hans Lippershey supposedly made the telescope. -
Dec 27, 1571
Johannes Kepler
Made/discovered laws of planetary motion. -
Refracting telescope
Telescope with converging lens that collect light. -
Giovanni Cassini
He discovered the gap between Saturn's rings and discovered four of it's largest moons. -
Sir Isaac Newton
Newton helped us understand gravity (the three laws of motion). -
Reflecting telescope
Unlike the refracting telescope the reflecting telescope uses a mirror. -
William Herschel
He discovered Uranus and its two moons. -
Percival Lowell
He predicted that another planet past Neptune and he found Pluto. -
Ejnar Hertzsprung
He classified types stars by color and brightness. -
Albert Einstein
He helped with everything from gravitational waves to the orbit of Mercury. -
Edwin Hubble
He was the first to know that other galaxies exist. -
Karl Jansky
He discovered extraterrestrial radio waves. -
Sputnik
It was the first satellite every sent to space -
Yuri Gagarin
First human in space. -
John Glenn
First American to orbit Earth. -
The Apollo Program
First american space missions. -
Neil Armstrong
First human on the moon. -
First Space Shuttle flight
First re-usable space shuttle -
1996 Mars Pathfinder Expedition
It was the first rover ever used. -
Cassini Orbiter
Landed on Titan (Saturn's largest moon) and revolutionized our understanding of Saturn and it's planets. -
Astronomy Now
NASA found a recently formed galaxy (Cosmic tadpole)
