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3 BCE
Eratosthenes's Longtitude and Latitude
Eratosthenes, 276 BCE to 194 BCE, mapped a method that used latitude and longtitude and it helped with coordinating locations across the Earth. -
2
Claudius Ptolemy's Geocentric Solar System
Claudius Ptolemy, from 100 CE to 170 Ce, developed a geocentric solar system and it explained how the planets, the Sun, and even the stars orbit the Earth. -
1500
Nicolaus Copernicus
Nicolaus Copernicus, from February 19, 1473 to May 24, 1543, discovered that the Earth rotates around on its axis and suggested that the Earth revolves around the Sun. -
1572
Tycho Brahe's Supernova
Tycho Brahe, from December 14, 1546 to October 24, 1601, observed a bright light and thought that it was a newborn star, but it was a dying star. The appearece of the "new star" helped to revise ancient models o fhte heavens and to speed up on a revolution in astronomy. -
Period: to
Johannes Kepler
Johannes Kepler, form December 27, 1571 to November 15, 1630, discovered three major laws of planetary motion. It was useful for making predictions of the planet's motions. -
Sir Isaac Newton's Laws of Gravity
Sir Isaac Newton, from December 25, 1642 to March 20, 1726, discovered the three laws of gravity. The three laws helped to derive Kepler's law of planetary motion. -
Albert Einstein
Albert Einstein, from March 14, 1879 to April 18, 1955, formulated the law of gravity. Because of this, it revolutionized modern astrophysics.