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240 BCE
Eratosthenes´s Calculations
Eratosthenes´s discovery was important because he measured the Earth´s circumference using 2 points in 240 B.C. -
140
Claudius Ptolemy´s theory
Claudius Ptolemy´s discovery was important because he helped with the idea that Earth was in the middle of the universe around 140 AD. -
1543
Nicolaus Copernicus (The Heliocentric Theory)
Nicolaus´s discovery was important because he stated that Earth and the other planets turn around the sun in 1543. -
Tycho Brahe´s observations
Tycho Brahe´es observations were an important discovery because it helped Kelper discover planets move in circles. -
Johannes Kepler (Elliptic Orbits)
Johannes Kelper´s discovery was important because it helped him figure out that planets moved in elliptic orbits in 1609. -
Sir Isaac Newton´s Law of Gravitation
This is an important discovery because it proves that gravity affects anything with mass in the universe. It was discovered in 1687. -
Albert Einsteins Astronomy discovery (Relativity)
Albert Einstein's discovery of relativity is important because it helped explain the universe´s origin. He worked on it in 1905 - 1915.