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ESO Approves 'Extremely Large Telescope' Study

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GARCHING, Germany, Dec. 12, 2006 -- The ESO Council, the governing body of the Garching-based European Southern Observatory (ESO), has authorized detailed studies for the European Extremely Large Telescope. The 57 million euro (approximately $75.4 million) studies will make it possible to start construction in three years on the optical/infrared telescope that officials said will revolutionize ground-based astronomy. "The decision by the ESO Council to go ahead with the design study for a European Extremely Large Telescope is a very exciting one for European astronomy," said Richard Wade, president of the ESO Council. An...Read full article

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    Published: December 2006
    Glossary
    adaptive optics
    Adaptive optics (AO) is a technology used to improve the performance of optical systems by reducing the effects of atmospheric distortions. The Earth's atmosphere can cause light passing through it to experience distortions, resulting in image blurring and degradation in various optical applications, such as astronomical observations, laser communications, and imaging systems. Adaptive optics systems actively adjust the optical elements in real-time to compensate for these distortions. Key...
    astronomy
    The scientific observation of celestial radiation that has reached the vicinity of Earth, and the interpretation of these observations to determine the characteristics of the extraterrestrial bodies and phenomena that have emitted the radiation.
    infrared
    Infrared (IR) refers to the region of the electromagnetic spectrum with wavelengths longer than those of visible light, but shorter than those of microwaves. The infrared spectrum spans wavelengths roughly between 700 nanometers (nm) and 1 millimeter (mm). It is divided into three main subcategories: Near-infrared (NIR): Wavelengths from approximately 700 nm to 1.4 micrometers (µm). Near-infrared light is often used in telecommunications, as well as in various imaging and sensing...
    light
    Electromagnetic radiation detectable by the eye, ranging in wavelength from about 400 to 750 nm. In photonic applications light can be considered to cover the nonvisible portion of the spectrum which includes the ultraviolet and the infrared.
    optical
    Pertaining to optics and the phenomena of light.
    photonics
    The technology of generating and harnessing light and other forms of radiant energy whose quantum unit is the photon. The science includes light emission, transmission, deflection, amplification and detection by optical components and instruments, lasers and other light sources, fiber optics, electro-optical instrumentation, related hardware and electronics, and sophisticated systems. The range of applications of photonics extends from energy generation to detection to communications and...
    telescope
    An afocal optical device made up of lenses or mirrors, usually with a magnification greater than unity, that renders distant objects more distinct, by enlarging their images on the retina.
    adaptive opticsAOastronomyBasic ScienceCesarskyE-ELTESOESO CouncilEuropean Very Large TelescopeinfraredlightmirrorsNews & FeaturesopticalOpticsphotonicstelescopeuniverseVLT

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