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Most advanced giant telescope mirror completed

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The most challenging astronomical mirror ever made – 10 times more powerful than any other large mirror – has been completed for a giant telescope that will explore star formation, black holes and planets in the early universe. Engineers at the University of Arizona and in California have been working for the past several years at the Steward Observatory Mirror Laboratory – located underneath the university’s football stadium – to polish an 8.4-m-diameter mirror with an unusual, highly asymmetric shape. This mirror, and six more like it, will form the...Read full article

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    Published: January 2013
    Glossary
    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.
    glass
    A noncrystalline, inorganic mixture of various metallic oxides fused by heating with glassifiers such as silica, or boric or phosphoric oxides. Common window or bottle glass is a mixture of soda, lime and sand, melted and cast, rolled or blown to shape. Most glasses are transparent in the visible spectrum and up to about 2.5 µm in the infrared, but some are opaque such as natural obsidian; these are, nevertheless, useful as mirror blanks. Traces of some elements such as cobalt, copper and...
    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.
    abrasivesAmericasAndes MountainsArizonaAsia-PacificastronomyAustraliaAustralian Astronomical ObservatoryBasic Scienceblack holesBuddy MartinBuell JannuziCaliforniaChilegalaxy formationGiant Magellan TelescopeglassGMTImaginglarge astronomical mirrorMatthew Collessmirrorsoff-axis mirrorsopticalOpticsphotonicsplanetary explorationpolishing opticsprecision opticsResearch & Technologystar formationSteward Observatory Mirror LaboratoryTech Pulsetelescopetelescope mirrorUniversity of ArizonaWendy Freedman

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