Saturday, February 24, 2018

Historical Timeline for TELESCOPES

Hubble - Photo: Wikimedia
It seems all the technology for telescopes started back in 2560 BC.  Artisans in ancient Egypt polished rocks, glass, and semi-precious stones to make eyes for the sarcophagi.  What follows is some major points in the history of how telescopes came to be today.
  • In 470 BC, Mozi, a Chinese philosopher, focused the sun's rays by using concave mirrors.
  • In 4 BC, Seneca the Younger used water to magnify letters and words.
  • In 23, Pliny the Elder discovered doctors using a crystal ball with the sun's rays beaming through it to cauterize wounds.
  • In the ninth century, telescopes were possibly made from Visby lenses, a Middle Eastern glass.
  • In 1520, Leonard Digges, an English mathematician, invented two telescopes – Reflecting and Refracting.
  • In 1608, A Dutch lensmaker, Hans Lippershey, applied for a patent on a design for a telescope.
  • In 1609, Galileo improved on Lippershey's design and renamed it “perspicillum” - An Italian word for a telescope.
  • In 1616, Niccolo Zucchi invented a reflecting telescope.
  • In 1663, James Gregory, a Scottish mathematician, produces a telescope with a parabolic primary mirror and an elliptical secondary mirror.
  • In 1668, Isaac Newton designed a telescope using a parabolic primary mirror and a flat diagonal secondary mirror.
  • In 1733, Chester Moore Hall created the achromatic lens.
  • In 1880, Ernst Abbe invented the first orthoscopic eyepiece.
  • In 1910, The Ritchey-Chretien telescope that is used in many of the large astronomical telescopes is invented by George Ritchey and Henri Chretien.
  • In 1930, The Schmidt camera is created by Bernhard Schmidt.
  • In 1937, Grote Reber developed a telescope for wavelengths ranging from radio to Xrays.
  • In 1944, The Maksutov telescope is designed by Dmitri Maksutov.
  • In 1962, The UK launched an orbiting solar telescope.
  • In 1990, the Hubble Telescope was launched into space.
  • In 2013, the James Webb Space Telescope will be launched and take the place of the Hubble.

And this all started with the polishing of a few stones.

More and newer information on Wikipedia

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