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    ESA > Space in Images > 2009 > 05 > Herschel

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    Herschel

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    • Title Herschel
    • Released 13/05/2009 3:46 pm
    • Copyright ESA
    • Description

      The Herschel telescope is a classic Cassegrain design with a 3.5-m primary mirror — the largest ever launched into space — and a smaller secondary mirror. This powerful telescope allows astronomers to look deep into space by detecting light emitted in the far-infrared and sub-millimetre regions of the spectrum. Earth's atmosphere prevents most of this light from reaching ground-based telescopes. From orbit around the second Lagrange point of the Sun-Earth system, L2, 1.5 million kilometres from Earth, Herschel bridges the gap between previous infrared observatories and ground-based radio telescopes. This picture of the satellite was taken during testing at ESA’s European Space Research and Technology Centre, ESTEC, the Netherlands.


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    • Activity Space Science
    • Mission Herschel
    • Keywords Astronomy targets , Astronomy techniques , Infrared and sub-mm

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