Ancient Astronomers Timeline

  • 276 BCE

    Eratosthenes Birth

    Eratosthenes  Birth
    1. Eratosthenes was born 276BC in Cyrene which is modern day Libya.
  • 255 BCE

    Invention of the Armillary SPHERE. by : ERATOSTHENES

    1. Eratosthenes invented the SPHERE.
  • 240 BCE

    ERATOSTHENES calculates earth circumefrence

    1. Eratosthenes received credit for calculating the earth circumference with great precision.
  • 194 BCE


    1. Eratosthenes died in 194BC around the age of 82 in
    2. Eratosthenes was a Greek mathematician , geographer, poet, astronomer and music theorist becoming the chief librarian at the Library of Alexandria.
  • 100

    Claudius Ptolemy Birth

    Claudius  Ptolemy  Birth
    1. Claudius Ptolemy was born on 100AD in Egypt, , Roman Empire.
  • 150

    Almagest , Ptolemy first major astronomical work

    Almagest , Ptolemy first major astronomical work
    1. Claudius Ptolemy first major astronomical work, the Almagest.
  • 170

    Claudius Ptolemy Death

    1. Claudius Ptolemy died in 170 at the age of 69 or 70 in
      Alexandria , Egypt , Roman Empire.
    2. Claudius Ptolemy was a mathematician, astronomer, astrologer, geographer and a music theorist , who wrote almost a dozen scientific treatises.
  • Feb 19, 1473

    Nicolaus Copernicus Birth

    Nicolaus  Copernicus  Birth
    2. Nicolaus Copernicus was born February , 19 1473 in Thorn ,
      Royal Prussia , Poland.
  • 1514

    The Little Commentary by : Nicolaus Copernicus

    1. By 1514 he circulated The Little Commentary to people he trusted.
  • May 24, 1543

    Nicolaus Copernicus Death

    1. Nicolaus Copernicus died on May 24, 1543 at the age of 70.
    2. Nicolaus Copernicus was a astronomer mathematician who formulated a model of the universe that placed the Sun not the Earth at its center.
  • Dec 14, 1546

    Tycho Brahe Birth

    Tycho  Brahe  Birth
    2. Tycho Ottesen Brahe born December 14, 1546 in Knutstorp
      Castle , Scania , Denmark - Norway
  • Dec 27, 1571

    Johannes Kepler Birth

    Johannes  Kepler  Birth
    1. Johannes Kepler was born December 27, 1571 in Free imperial City of Weil der Stadt , Holy Roman Empire.
  • 1572

    Supanova found by : Tycho Brahe

    1. he refuted the Aristotelian belief.
  • Kepler met Tycho Brahe

    Kepler met Tycho Brahe
    February 4, 1600 Kepler met Tycho Brahe.
  • Tycho Brahe Death

    1. Tycho Brahe died in Prague , Kingdom of Bohemia , Holy
      Roman Empire at the age of 54.
    2. Tycho Brahe was a Danish astronomer. When he died he was

      known for his accurate and comprehensive astronomical
  • Keplers Supernova of 1604

    Keplers Supernova of 1604
    1. A bright new evening star (SN 1604) appeared October of 1604.
    2. Kepler systematically observes the supernova.
  • Johannes Kepler Death

    Johannes  Kepler  Death
    1. Johannes Kepler died November 15, 1630 at the age of 58
      in Free Imperial City of Regensburg , Holy Roman Empire .
    2. Johannes Kepler was a German astronomer ,
      mathematician , astrologer , philosopher and a writer of
    1.. Kepler laws of planetary motion provided a foundation for
    Newtons theory of universal gravitation.
  • Sir Isaac Newton Birth

    Sir Isaac Newton Birth
    2. Sir Isaac Newton was born on January 4, 1643 in
      Wolsssssthorpe-by-Colsterworth , Lincolnshire , England.
  • Isaac Newton Law of Gravity

    Isaac Newton Law of  Gravity
    1. Isaac Newton formulated the first Law of Motion.
  • Isaac Newton Death

    1. Isaac Newton died on March 31, 1727 in Kensington ,
      Middlesex , Great Britian at the ae of 84.
    2. Sir Isaac Newton was an English mathematician , physicist, astronomer, and recognized as one of the greatest mathematicians and physicists of all times.
    3. Sir Isaac Newton was a key figure in the philosophical revolution known as the Enlightenment.
  • Albert Einstein Birth

    Albert  Einstein  Birth
  • Annus Mirabillis Papers By : Albert Einstein

    Annus Mirabillis Papers By :  Albert Einstein
    1. Annus Mirabillis was known as Einsteins miracle year.
    2. Einstein published four papers that outlined the theory of the photoelectric effect, explaining Brownian motion, introducing special relativity, and demonstrating mass-energy equivalence.
  • Albert Einstein Death

    1. Albert Einstein died on April 18, 1955 at the age of 76 in
      Princeton , New jersey.
    2. Albert Einstein was a German-born physicst mostly known as one of the greastest and most influential physicists of all times.
    3. Einstein is known best for developing the theory of relativity.