History of the telescope
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The history of the telescope can be traced to before the invention of the earliest known telescope, which appeared in 1608 in the Netherlands, when a patent was submitted by Hans Lippershey, an eyegla
Early depiction of a "Dutch telescope" from 1624.
Optical diagram showing light being refracted by a spherical glass container full of water, from Roger Bacon, De multiplicatione specierum
Notes on Hans Lippershey's unsuccessful telescope patent in 1608
Reproduction of one of the four optical devices that Zacharias Snijder in 1841 claimed were early telescopes built by Zacharias Janssen. Its actual function and creator has been disputed over the years.
Telescope
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A telescope is a device used to observe distant objects by their emission, absorption, or reflection of electromagnetic radiation. Originally, it was an optical instrument using lenses, curved mirrors
The 100-inch (2.5 m) Hooker reflecting telescope at Mount Wilson Observatory near Los Angeles, used by Edwin Hubble to measure galaxy redshifts and discover the general expansion of the universe.
Replica of possibly the oldest surviving telescope (1609–1640), suspected to be an early "Cannocchiali" refracting telescope by Galileo Galilei.
A replica of a second reflecting telescope Isaac Newton presented to the Royal Society in London in 1672
Three radio telescopes belonging to the Atacama Large Millimeter Array