Ancient Astronomers

By b.prado
  • 240 BCE

    eratosthenes

    eratosthenes
    Eratosthenes was a Greek mathematician and astronomer who is known for his work on the measurement of the Earth's circumference. In 240 BCE, he calculated the circumference of the Earth using the angle of the sun's rays at two different locations, it helped to establish the size and shape of the Earth, which was a major milestone in the history of astronomy and geography.
    Eratosthenes was born in 276 BCE and died in 194 BCE.
  • 127 BCE

    Claudius Ptolemy

    Claudius Ptolemy
    Claudius Ptolemy was a Greek astronomer and mathematician who lived in the 2nd century CE. He is known for his book "Almagest," which was a comprehensive treatise on astronomy that provided a more accurate description of the motion of the planets than previous models.
  • 1504

    Nicolaus Copernicus

    Nicolaus Copernicus
    From his observations, Copernicus concluded that every planet, including Earth, revolved around the Sun. In 1504, Copernicus began the research that culminated in his heliocentric theory. He was the first European scientist to propose that Earth and other planets revolve around the sun, the heliocentric theory of the solar system.Born: February 19, 1473, Toruń, Poland
    Died: May 24, 1543, Frombork, Poland

  • Tycho Brahe

    Tycho Brahe
    • Geo-heliocentric model (the Tychonic system). it happened in March 5, 1590. Itdramatically altered the scientific perspective of how we view our world.Born: December 14, 1546, Knutstorp Manor, Sweden Died: October 24, 1601, Prague, Czechia.

  • Johannes kepler

    Johannes kepler
    Johannes Kepler was a German astronomer who is known for his three laws of planetary motion. In 1609, he published his first two laws.
    Kepler's discoveries were important because they helped to establish the foundations of modern astronomy and physics. His laws of planetary motion provided a more accurate description of the motion of the planets than the previous model proposed by Ptolemy. Johannes Kepler was born in 1571 and died in 1630

  • Sir Isaac Newton

    Sir Isaac Newton
    Sir Isaac Newton was an English mathematician. who published his book "Philosophiæ Naturalis Principia Mathematica" in 1687. The book contained his laws of motion and the law of universal gravitation, which provided a new understanding of the physical laws that govern the motion of objects in the universe. Newton's discoveries helped to explain the motion of the planets and other celestial bodies and provided a foundation for the development of modern physics and astronomy

  • Albert Einstein

    Albert Einstein
    Albert Einstein is known for many contributions to physics, including his theory of relativity, which revolutionized our understanding of space and time. However, he also made important contributions to our understanding of the photoelectric effect, which helped to establish the field of quantum mechanics. In 1905, Einstein published a paper on the photoelectric effect, which described how electrons are emitted from a metal surface when it is exposed to light.