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384 BCE
Aristotle
Aristotle can be known as the grandfather of science. He had a theory that the Earth was the center of the universe. He had a model of the universe -
100
Ptolemy
Ptolemy created the Ptolemaic system. The Ptolemaic System was the the Earth of stationery and the planets moved around it. The other planets were in uniform motion -
1473
Copernicus
He is considered the founder of modern astronomy. He came up with hiliocentric which the sun was the center of the universe not the Earth. He said that Earth rotated an a daily axis. -
1546
Tycho Brahe
He made observations to support the heliocentric theory. He had proved that comets were objects were in space not in Earth's atmosphere. He also invented the Tyconian Quadrant. -
1564
Galileo
Galileo built a telescope using a spyglass. he discovered four moons around Jupiter. He proved the heliocentric theory right. -
1570
Hans Lippershey
He was credited with making the telescope. Even thought he did not make it he obtained a patent for if for 30 years. -
1571
Johannes Kepler
He discovered the 3 major laws of Planetary motion. The firs law is the planets move in elliptical orbits. The second one is the time necessary to traverse any arc of a planetary orbit. the third one is, there is a relationship between the squares of the planets. -
Refracting and reflecting telescopes
Refracting telescopes uses lenses to find light. Reflecting telescopes uses mirrors to find light. -
Giovanni Cassini
He is known for the Cassini laws which is the motion of the moon.He is the first person to discover the division of Saturns rings. -
Sir Isaac Newton
Sir Isaac Newton formulated forces. He formulated gravity and discovered laws of motion. Newton came up with the design for a reflecting telescope in 1668 -
William Herschel
William Herschel discovered Uranus. He had the idea that nebulae were composed of stars. -
Percival Lowell
He founded the Lowell Observatory in Flagstaff Arizona. He discovered Pluto in the observatory. -
Ejnar Hertzsprung
He classified stars by their absolute brightness and color. He made the Hertzsprung-Russell Diagram -
Albert Einstein
He showed how mass and energy were equivalent. He link for dimensional gravitational with the orbits of the planets. He made the formula E=mc2 which is atomic power in an atomic bomb. -
Edwin Hubble
Know as one of the most important astronomer of all time. He discovered our Milky Way and more galaxies. He found that the speed and galaxies distance are related. -
Karl Jansky
Jansky was the first person to discover radio waves emanating from the Milky Way. He is considered one of the founding figures of radio astronomy. -
Sputnik
The Sputnik was the first satellite successfully placed in orbit around the Earth. -
Yuri Gagarin
He was the first person to enter outer space. April 12, 1961 his Vostok spacecraft orbited Earth one time. -
John Glenn
John Glenn was the first to orbit earth in Friendship-7. His missions were the Mercury -Atlas6 and STS-95. He was the oldest man to fly into outer space. -
Neil Armstrong
Neil Armstrong was the first person to step foot on the moon. He was also a test pilot and a naval aviator. -
The Apollo Program
This was the third US spaceflight with humans. NASA successfully landing the first ever people on the moon. -
First Space Shuttle Flight
It was the first orbital spaceflight of NASA's Space Shuttle program. The first orbiter launched April 1981. It orbited the Earth 36 times. -
Mars Pathfinder Expedition
It took off December 1996 and landed July 1997.This was the first robotic rover to ever surface of Mars. It came back with lots of data and out lived it’s “life”. -
Cassini Orbiter
The Cassini Orbiter orbited Saturn 294 times. This was to get a close look at Saturn’s moons. -
System-Pan-STARRS
The University of Hawaii uses 1.8 metret elescope and a 1.4-billion-pixel digital camera to view Pan-STARRS. They went operation on Mount Haleakala.
