Basic timeline of telescopes

Photo source: Wikimedia Commons, NASA

This post is a basic timeline of the telescope. There are 25 events listed below chronologically.

• 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