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Gravitational Lensing Technique Discerns Distant Quasar

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PARIS, Nov. 9, 2011 — A new twist on gravitational lensing has led to a unique view of a quasar surrounding a distant black hole. While black holes themselves are invisible, the forces they unleash cause some of the brightest phenomena in the universe. Quasars — glowing discs of matter that orbit supermassive black holes — heat up and emit extremely bright radiation as they do so. Using the Hubble Space Telescope, an international team of astronomers measured the quasar’s size and studied the colors (and hence the temperatures) of different parts of the disc. These observations show a...Read full article

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    Published: November 2011
    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.
    accretion discsAmericasastronomyBasic Scienceblack holesEuropeFrancegravitational lensingHarvard-Smithsonian Center for AstrophysicsHubble Space TelescopeImagingInstituto de Astrofisica de CanariasJose A. MuñozMicroscopyOhio State UniversityquasarsResearch & Technologyscanning microscopesSpainUniversity of Valencia

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