History 2

By ashleymarie7398
  • 276 BCE

    Eratosthenes was born

  • 240 BCE

    Eratosthenes measured the circumference of the earth

  • 194 BCE

    Eratosthenes Died

  • 85

    Claudius Ptolemy

  • 130

    Ptolemy was convinced that the Earth was the center of the Universe. He made calculations on the rotations and was accepted as one of the greatest astrologists.

  • 165

    Claudius Ptolemy

  • 1473

    Copernicus

  • 1512

    Copernicus releases his ideas on the Earth revolving around the Sun to his close friends.

  • 1543

    Copernicus publishes his book

  • 1543

    Copernicus

  • Feb 15, 1564

    Galileo Galilei was born

  • Galileo believed the heliocentric view

  • Galileo discovered that Copernicus was right

  • Galileo's astronomical observation had a visible supernova

  • Galileo saw Jupiter's moons orbit which contradicted the idea that Earth was the center of the universe

  • Galileo Galilei died

  • Isaac Newton was born

  • Newton had a theory about gravity when he questions an apple falling

  • Discovered the laws of motion and gravity

  • Newton discovered white light is made of all colors (published 1762)

  • Isaac Newton died

  • Charles Darwin was born

  • Marie Curie was born

  • Alfred Wegener was born

  • Charles Darwin died

  • Polonium Discovery

    Marie Curie discovered Polonium, which is 400 times more radioactive than any other known element at the time.

  • Radium Discovery

    Marie discovers radium, which is 900 times more radioactive than polonium.

  • Rays of Polonium and Radium

    Marie discovered the rays of polonium and radium were tiny atoms that were disintegrated inside the elements.

  • Haary Hammond Hess was born

  • Wegener co wrote The Thermodynamics of the Atmosphere

  • Alfred Wegener dies

  • Marie Curie dies

  • Harry Hess discovered the ocean floor wasn't smooth

  • Harry Hammond Hess dies