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'Heart' of Herschel to be presented to media

By the end of 2007, the assembly of the ESA's Herschel far-infrared space observatory - the latest mission to study the formation and evolution of stars and galaxies - will be completed.

ESA and Astrium are jointly inviting the media to a press conference in Friedrichshafen, Germany, on 19 September 2007, to hear about this revolutionary spacecraft, its scientific objectives, and to view the very heart of its hardware.

The Herschel mission, equipped with the largest telescope ever launched in space (3.5 m diameter), will give astronomers their best capability yet to explore the universe at far-infrared and sub-millimetre wavelengths. By measuring the light at these wavelengths, scientists see the 'cold' universe. Herschel will give them an unprecedented view, allowing them to see deep into star forming regions, galactic centres and planetary systems.

In order to achieve its objectives and to be able to detect the faint radiation coming from the coolest objects in the cosmos, otherwise 'invisible', Herschel's detectors must operate at very low and stable temperatures. The spacecraft is equipped so as to cool them close to absolute zero (-273.15 C), ranging from -271 C to only a few tenths of a degree above absolute zero. To have achieved this particular feature alone is a remarkable accomplishment for European industry and science.

The final integration of the various components of the Herschel spacecraft - payload module, cryostat, service module, telescope and solar arrays - will be completed in the next few months. This phase will be followed by a series of tests to get the spacecraft ready for launch at the end of July 2008. Herschel will be launched into space on an Ariane 5 ECA rocket. The launch is shared with Planck, ESA's mission to study relic radiation from the Big Bang.


Contact: ESA Media Relations Office
European Space Agency

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