Photo source: Wikimedia Commons, NASA
- First use of eyeglasses in Northern Italy (13th century)
- Patent for the telescope is submitted by Hans Lippershey (1608)
- Improved telescope invented by Galileo Galilei (1609)
- Theory of telescopes provided by Johannes Kepler (1611)
- Reflector telescope built by Isaac Newton (1668)
- Improved reflector telescope is constructed by Laurent Cassegrain (1672)
- Achromatic lens telescope built by Chester Moore Hall (1733)
- Achromatic lens telescopes is commercially produced by John Dollond (1758)
- Silvering glass mirror telescope built by Leon Foucault (1857)
- Yerkes Observatory refractor is constructed (1897)
- Ritchey-Chretien variant of reflector telescope is invented (1910)
- Hooker Telescope is constructed (1917)
- Radio telescope is constructed by Grote Reber (1937)
- Hale Telescope is constructed (1948)
- Ultraviolet telescope Orbiting Solar Observatory is launched (1962)
- X-ray telescope experiments begin (1962)
- Gramma-ray telescope OSO 3 satellite is launched (1967)
- International Ultraviolet Explorer is launched (1978)
- IRAS satellite is launched (1983)
- Cosmic Background Explorer is constructed (1989)
- Hubble Space Telescope is launched (1990)
- Keck Telescope is constructed (1993-1996)
- Large Millimeter Telescope is constructed (2006)
- Gran Telescopio Canarias is constructed (2008)
- James Webb Space Telescope planned launch (2021)
Sources
Wikipedia: History of encyclopedias, Gran Telescopio Canarias
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