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255 BCE
Eratosthenes
He crested a system of latitude and longitude, and a calendar that included leap years. He also invented the armillary sphere, a mechanical device witch is used by early astronomers to demonstrate and predict the apparent motions of the stars in the sky.
This is relevant because we used the calendar to this day. -
150 BCE
Claudius Ptolemy
Ptolemy synthesized Greek knowledge of the known Universe. His work enabled astronomers to make accurate predictions of planetary positions and solar and lunar eclipses, -
1543
Nicolaus Copernicus
He was the first modern European scientist to state that Earth and other planets revolve around the sun. This is still relevant because it is now proven that this is true. -
Tycho Brahe
Tycho Brahe made observations of the stars and planets. He did a study of the “new star” that appeared in 1572. Showing that they where farther away than the Moon and they were among the fixed stars, which were marked as perfect and unchanging. This is still relevant because we now look at those planets regularly. -
Johannes Kepler
He regarded them as celestial harmonies that reflected God's design for the universe. Kepler's discoveries turned Nicolaus Copernicus's Sun-centred system into a dynamic universe, with the Sun actively pushing the planets around in noncircular orbits. All of this is now known as Keplers first 2 laws -
Sir Isaac Newton
With this, Newton proposed that all objects in the Universe pulled on each other through gravity. It was the reason why planets move in orbits and why objects fall to the Earth. -
Albert Einstein
Albert Einstein was in charge of the development of the theory of relativity, from 1905 to 1915, this eventually led to an explanation of the origin of the universe.