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A radio telescope is a specialized antenna and radio receiver used to detect radio waves from astronomical radio sources in the sky. [ 1 ] [ 2 ] [ 3 ] Radio telescopes are the main observing instrument used in radio astronomy , which studies the radio frequency portion of the electromagnetic spectrum , just as optical telescopes are used to ...
The telescope is more a discovery of optical craftsmen than an invention of a scientist. [1] [2] The lens and the properties of refracting and reflecting light had been known since antiquity, and theory on how they worked was developed by ancient Greek philosophers, preserved and expanded on in the medieval Islamic world, and had reached a significantly advanced state by the time of the ...
Visible-light astronomy has existed as long as people have been looking up at the night sky, although it has since improved in its observational capabilities since the invention of the telescope, which is commonly credited to Hans Lippershey, a German-Dutch spectacle-maker, [1] although Galileo played a large role in the development and ...
For example, a 1-meter diameter optical telescope is two million times bigger than the wavelength of light observed giving it a resolution of roughly 0.3 arc seconds, whereas a radio telescope "dish" many times that size may, depending on the wavelength observed, only be able to resolve an object the size of the full moon (30 minutes of arc).
radio (at 1.3 cm) very long baseline interferometry array of different radio telescopes: a range of locations on Earth and in space [8] 2002 - Very Large Telescope/PIONIER: 0.001 (1 mas) light (1-2 micrometre) [9] largest optical array of 4 reflecting telescopes: Paranal Observatory, Antofagasta Region, Chile: 2002/2010 - Hubble Space Telescope ...
The James Webb Space Telescope’s first images revealed new details of the cosmos, peering farther into space than the Hubble Space Telescope. Hubble vs. Webb: See side-by-side comparisons of the ...