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Date: 13 May 2009
Satellite: Herschel
Location: ESTEC, Noordwijk, The Netherlands
Copyright: ESA

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.

Last Update: 1 September 2019
14-Jun-2024 18:17 UT

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