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| Hubble - Photo: Wikimedia |
- 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.
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