Alex Johnson Astronomy Timeline

By 17ajohnson
  • Apr 30, 1543

    Nicolaus copernicus

    Nicolaus Copernicus publishes a book that contains the theory about how the Earth rotates around the sun.

  • The third law of planetary motion

    The third law of planetary motion is announced by Keplar in is work.

  • Galileo Galilei

    Galileo publishes a bok that talks about the observations he made with the telescope he built.

  • Telescope

    The first reflecting telescope was built by Newton.

  • Speed of light

    The speed of light was discovered by Ole romer

  • Universal Gravitation

    Newton publishes his theory of Universal gravitaion.

  • Uranus

    Herschel discovers Uranus

  • Asteroids

    Asteroids were discivered by Piazza

  • pluto

    Pluto was discovered by Clyde Tombaugh.

  • first Satellite

    Russia launchers their first artificial satellite into space, the Sputnik 1.