File:A Laser Comb for Astronomy.jpg
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Summary
| Description |
English: Artist's impression of the laser comb developed for astronomy. Such a laser comb is necessary to act as a 'ruler' for calibrating the new, extremely precise spectrographs that will be needed in the future to search for Earth-like planets or measure the expansion of the Universe. To test this laser comb, a team of scientists went to the telescope and analysed the light coming from the Sun. The light from the Sun was coupled to an optical fibre that guides it to a spectrograph (prism) in order to resolve its spectral lines. The spectral lines from the Sun appear as dark bands because they represent the wavelengths of light that has been absorbed by the Sun's photosphere as it emerges from deeper within it. Superimposed are many short, bright (white) spectral lines of the laser frequency comb that serve for calibration. The spectrum shown is the real observed one. Español: Impresión artística del Peine Láser desarrollado para la astronomía. Dicho láser es necesario para que actúe como “regla“ que calibre al nuevo y extremadamente preciso espectrógrafo que será necesario en el futuro para buscar planetas similares a la Tierra o para medir la expansión del Universo. A fin de probar este peine láser, un equipo de científicos analizó en el telescopio la luz proveniente del Sol. Esta luz fue asociada a una fibra óptica que la guió al espectrógrafo (prisma) a fin de estudiar sus líneas espectrales. Las líneas espectrales del Sol aparecen como bandas oscuras porque representan las longitudes de onda de la luz que ha sido absorbida por la fotósfera del Sol en la medida que emerge desde el fondo de su profundidad. Se superponen varias líneas espectrales brillantes (blancas) del Peine de de Frecuencias Láser que sirven para calibrar. El espectro mostrado es el que realmente se observó. |
| Date | |
| Source | http://www.eso.org/public/images/eso0826a/ |
| Author | ESO |
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This media was created by the European Southern Observatory (ESO).
Their website states: "Unless specifically noted, the images, videos, and music distributed on the public ESO website, along with the texts of press releases, announcements, pictures of the week, blog posts and captions, are licensed under a Creative Commons Attribution 4.0 International License, and may on a non-exclusive basis be reproduced without fee provided the credit is clear and visible." To the uploader: You must provide a link (URL) to the original file and the authorship information if available. |
  This file is licensed under the Creative Commons Attribution 4.0 International license.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 18:36, 26 December 2013 | | 2,509 × 3,366 (902 KB) | Stas1995 | User created page with UploadWizard |
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