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322 BCE
Aristotle
Aristotle 384-322 BC he proved that earth is round and that was in the center of the universe. -
170 BCE
Ptolemy
100-170 AD Ptolemy was an astronomer and mathematician. He believed that the Earth was the center of the Universe. The word for earth in Greek is geo, so we call this idea a "geocentric" theory. -
120 BCE
Hipparchus
190-120 BC he was the founder of trigonometry. -
1543
Copernicus
He put up a theory that the sun is near the center of the universe and that the Earth is spinning on its axis daily. -
Tycho Brahe
He was one of the individuals who helped to make the heliocentric model of the universe -
Hans Lippershey
he was part of the making of the telescope he was the first to try to obtain a patent for it. -
Refracting telescope
The difference between a refracting and a reflecting telescope is in their optical construction. The refracting telescope uses a system of lenses to refract light rays, while a reflecting telescope uses a system of mirrors to reflect light rays. Reflectors are usually used to view brighter stars and planets. -
Reflecting telescope
The difference between a refracting and a reflecting telescope is in their optical construction. The refracting telescope uses a system of lenses to refract light rays, while a reflecting telescope uses a system of mirrors to reflect light rays. Reflectors are usually used to view brighter stars and planets. -
Johannes Kepler
he worked with Brahe . He made a large discovery. He discovered that the planets are Ovals. -
Galileo
he was known for the telescope person. 4 moons of jupiter proved that not everything in the sky revolves around the Earth. Stars not fixed to celestial sphere. Discovered sunspots. -
Giovanni Cassini
he discovered that the earth moves on its axis so it doesn't exactly move exactly. -
Sir Isaac Newton
he made the reflecting telescope. -
William Herschel
Herschel performed a simple experiment determining the temperature of the different colors of sunlight passed through a prism. -
Percival Lowell
He founded the Lowell Observatory in Flagstaff, Arizona and formed the beginning of the effort that led to the discovery of Pluto 14 years after his death. -
Karl Jansky
radio waves are emanating from space. Radio waves are the longest type of energy waves. -
Edwin Hubble
His discovery in the 1920s that there was a milky way and many other galaxies. -
Albert Einstein
He developed the famous equation E=mc2 that helped astronomers to find how much energy there is in a star. -
Sputnik
the first satellite was launched into space. -
Yuri Gagarin
the first human to orbit Earth 108 minutes. He was Russian. -
John Glenn
he was the U.S. Citizen to orbit Earth 3X. -
Ejnar Hertzsprung
he created the Hertzsprung Russell diagram. It was basically defining colour. -
Neil Armstrong
first man to walk on the moon -
Period: to
Apollo Missions
It was a program made for humans to get on the moon safely. -
First Space Shuttle
shot like a rocket and land like a plane. -
Mars pathfinder
was the second of NASA's low-cost planetary Discovery missions to be launched. The mission consists of a stationary lander and a surface rover. -
Cassini Orbiter
it was the froth space probe to visit saturn and the first to enter its orbit. -
SpaceX Falcon Heavy
Falcon Heavy' is a partially reusable super heavy-lift launch vehicle designed and manufactured by SpaceX.
