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1st telescope
Hans Lippershey was a lensmaker created the first telescope that could magnify objects three times. -
Improvement of the 1st telescope
Galileo Galiley improved the maginification of the 1st telescope up to 10x but the view was narrow. He ends up calling it "perspicillum". -
Refracting telescope: Keplerian telescope
Keplerian telescope built by Johannes Kepler is a kind of astronomical telescope with one convex lense instead of one concave lense. The designed was an improvement from the Galileo's telescope. -
The word "telescope" used
First used in public by Giovanni Demisiani at a banquent. The word means, Greek τῆλε, tele "far" and σκοπεῖν, skopein "to look or see". -
"claim of exploring the idea of a reflecting telescope in 1616"
Italian astronomer, Niccolò Zucchi claims to invent the idea of using a curved mirror as an image forming objective. He used a a concave lens and a bronze parabolic mirror. He did eventually formed on of the earliest refracting telescopes. -
the Huygens ocular
1650s Christiaan Huygens produces his design for a compound eyepiece. Composed of two planoconvex lenses so arranged that the plane side of each is directed toward the observer. -
the 'Newtonian'.
First functioning reflecting telescope using a paraboloid/spherical primary mirror and a flat diagonal secondary mirror. -
LONG "aerial telescopes"
The contruction of a 150 feet long refracting telescope occured in the 1670s. The refracting telescope built by Johannes Hevelius in Danzig. (Was: Tubeless, required lots of patience to look through the eyepiece, and it was easily moved by the wind) -
Altered Newton Telescope by John Hadley
A 6 inch parabolic mirror is used in the Newtonian telescope. The replica is demonstrated to the Royal Society. -
Cassegrain telescope
Reflecting telescope using primary concave mirror and a secondary convex mirror, often used in optical telescopes and radio antennas.
Used in astronomical telescopes & in observatories in 2006. -
'Gregorian' Telescope
Early 1970s from the idea of the mathematician James Gregory (c.1663), Robert Hooke, invents a reflecting telescope with a paraboloid primary mirror and ellipsoid secondary mirror. The design was mostly taken over from the Cassegrain telescope. It is still used for some spotting scopes because this design creates an erect image without the need for prisms. -
"Astroscopia Compendiaria" By Christiaan Huygens is published
Huygens is recognized for his amazing Astronomical instruments from early works to 1800. In this publication he talks about his invention: aerial/tubeless telescope. -
New and improved Gregorian telescope
With a lot of time and effort, John Hadley, develops ways of aspherizing spherical mirrors to make very accurate parabolic mirrors. He spreads the word for the use of other astronomers out htere. -
Uranus discovered by Sir William Herschel
1789 Herschel used a self made refracting telescope funded by King George the 3rd. -
1990s Hubble Space Telescope
Launched into low Earth orbit in 1990, and remains in operation. Hubble's four main instruments observe in the near ultraviolet, visible, and near infrared spectra. The telescope is named after the astronomer Edwin Hubble. -
The Large Binocular Telescope (LBT)
This is currently one of the world's most advanced optical telescopes and it's located in Arizona, USA. -
James Webb Telescope
The telescope was formerly known as the "Next Generation Space Telescope" (NGST) and then renamed in 2002 after a former NASA administrator, James Webb. The James Webb Telescope will be launched on October 2018.
