Timeline of Astronomy and Telescopes

  • The Spyglass is Invented

    Galileo did not invent the telescope. But he did modify a curiosity called the spyglass that in 1609 was beginning to be sold by spectacle makers and peddlers in Europe.
  • First Reflecting Telescope

    Isaac Newton built the new reflecting telescope
  • Spiral Nebulae are Discovered

    In 1845, Lord Rosse used his
    largest telescope to see the
    spiral structure of M51.
  • Scientists Learn How To Put Silver On Glass

    1850’s: German chemists used
    a chemical reaction to make a
    silver-on-glass mirror.
  • The First Permanent Solar Telescope Is Built

    By 1904, the Snow Solar
    Telescope was built and then
    moved to its permanent home
    atop Mount Wilson.
  • The First Radio Telescope Invented

    An amateur radio operator, Grote Reber, was one of the pioneers of what became known as radio astronomy when he built the first parabolic "dish" radio telescope (9 metres (30 ft) in diameter) in his back yard in Illinois in 1937.