A telescope is an instrument that aids in the observation of remote objects by collecting electromagnetic radiation (such as visible light). The first known practical telescopes were invented in the Netherlands at the beginning of the 17th century, using glass lenses. They found use in terrestrial applications and astronomy.

Within a few decades, the reflecting telescope was invented, which used mirrors. In the 20th century many new types of telescopes were invented, including radio telescopes in the 1930s and infrared telescopes in the 1960s. The word telescope now refers to a wide range of instruments detecting different regions of the electromagnetic spectrum, and in some cases other types of detectors.

The word "telescope" (from the Greek τῆλε, tele "far" and σκοπεῖν, skopein "to look or see"; τηλεσκόπος, teleskopos "far-seeing") was coined in 1611 by the Greek mathematician Giovanni Demisiani for one of Galileo Galilei's instruments presented at a banquet at the Accademia dei Lincei. In the Starry Messenger Galileo had used the term "perspicillum".

Read more about Telescope:  History, Types of Telescopes, Types of Telescope Mount, Atmospheric Electromagnetic Opacity, Telescopic Image From Different Telescope Types, Telescopes By Spectrum, Lists of Telescopes

Other articles related to "telescope, telescopes":

Molonglo Observatory Synthesis Telescope
... The Molonglo Observatory Synthesis Telescope (MOST) is a radio telescope operating at 843 MHz ... The telescope is located near the Molonglo River near Canberra, Australian Capital Territory, and was constructed by modification of the East-West arm of the former Molonglo ...
Optical Mechanics, Inc.
... or OMI is a high-end American telescope and optics instrument manufacturer ... OMI was founded in 2002 and produces observatory telescopes, Lidar telescopes, optical tube assemblies, telescope mirrors and reflective coatings for ... OMI mirrors are used by other telescope makers such as Obsession Telescopes ...
Lists of Telescopes
... List of optical telescopes List of largest optical reflecting telescopes List of largest optical refracting telescopes List of largest optical telescopes historically List of radio telescopes List of ...
Siding Spring Observatory
... at the Australian National University (ANU), incorporates the Anglo-Australian Telescope along with a collection of other telescopes owned by the Australian National University, the University of New South Wales, and ... There are currently 12 telescopes on site ... Between 1953 and 1974, the 74-inch (1.9 m) reflecting telescope at Mount Stromlo was the largest optical telescope in Australia ...
National Virtual Observatory - Data
... including data from the Hubble Space Telescope, the Chandra X-ray Observatory, the Spitzer Space Telescope, and other space-based missions ... nearly every astronomical research facility, observatory, and telescope across the globe ...

Famous quotes containing the word telescope:

    The telescope at one end of his beat,
    And at the other end the microscope....
    Robert Frost (1874–1963)

    The sight of a planet through a telescope is worth all the course on astronomy; the shock of the electric spark in the elbow, outvalues all the theories; the taste of the nitrous oxide, the firing of an artificial volcano, are better than volumes of chemistry.
    Ralph Waldo Emerson (1803–1882)