 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
| . |  |
. |
Herschel's Heart And Brain Mated
Friedrichshafen, Germany (SPX) Sep 20, 2007 Herschel, Europe's infrared space observatory is being presented to the media in a joint press event by ESA and Astrium in Friedrichshafen, Germany. Two of the satellite's most fundamental modules, its 'heart' and 'brain', have now been mated. The far-infrared space observatory is ESA's latest mission that will study the formation and evolution of stars and galaxies. Herschel will carry the largest telescope ever flown in space, giving astronomers their best view yet of the cold and most distant objects in the universe. It will collect very long infrared wavelengths, peeking into star-forming regions, galactic centres and planetary systems. To protect the sensitive instruments from heat generated during operations and to achieve its challenging objectives, the satellite must operate at very low temperatures. This is why the spacecraft's brain - or its payload module - hosts a cryostat, a cryogenic module inside which the cold components of the scientific instruments are mounted. Inside the cryostat the sensitive instrument detectors are cooled down to about -273 C (0.3 degrees above absolute zero). This low temperature is achieved using superfluid helium (at about -271 C) and an additional cooling stage inside the focal plane units. The service module is the spacecraft's heart, which keeps the spacecraft going by caring for all its vital functions. It also carries the 'warm' components of the instruments - those that do not require cooling with the cryostat. Between late July and early August this year, the cold and warm units of the instruments were mated with the cryostat and the service module respectively. Last week, on 11 September, the cryostat containing the cold instrument units was finally mounted on the service module, mating Herschel's heart and brain. This fundamental step will be followed by functional and compatibility tests at Astrium before the spacecraft is sent to ESA's European Space Research and Technology Centre (ESTEC) in November for final environmental (thermal, mechanical, acoustic) and functional acceptance tests. In late December 2007 or early 2008, after the functional tests, the telescope and the solar arrays - two other fundamental parts of the payload module - will be mated to the rest of the spacecraft, completing Herschel. Herschel is scheduled to launch from Europe's spaceport at Kourou in French Guiana on 31 July 2008, on an Ariane 5 ECA launch vehicle. The launch will be shared with Planck, ESA's mission that will study relic radiation from the Big Bang. The Prime Contractor for Herschel is Thales Alenia Space (Cannes, France). It leads a consortium of industrial partners with Astrium (Germany) responsible for the Extended Payload Module (EPLM, including the Herschel cryostat), Astrium (France) responsible for the telescope, and the Thales Alenia Space industry branch of Torino, Italy, responsible for the Service Module (SVM). There is also a host of subcontractors spread throughout Europe. The three instruments on Herschel were designed and built by consortia of scientists and institutes, with their own national funding. The Photodetector Array Camera and Spectrometer (PACS) was developed under the coordination of the MPE, Germany; the Spectral and Photometric Imaging Receiver (SPIRE) was developed under the coordination of the Cardiff University, United Kingdom; and the Heterodyne Instrument for the Far Infrared (HIFI) under the coordination of SRON, Netherlands Institute for Space Research. Community Email This Article Comment On This Article Related Links Latest multimedia on Herschel Space Telescope News and Technology at Skynightly.com
Arecibo Telescope's Users Meet To Plan Threatened Observatory's Scientific Future
Washington DC (SPX) Sep 20, 2007More than 70 astronomers gathered on Capitol Hill this week, not to talk about the demise of a major national research facility, but to plan for its scientific future. With optimism, the group was planning the next 15 years of research for Puerto Rico's Arecibo Observatory, the home of the world's largest radio telescope. Despite proposed severe federal budget cuts for the observatory by 2011, the astronomers -- users from all over the world -- had enough faith to plan for new research and new instrumentation on the 44-year-old telescope. |
|
|
| The content herein, unless otherwise known to be public domain, are Copyright 1995-2007 - SpaceDaily.AFP and UPI Wire Stories are copyright Agence France-Presse and United Press International. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by SpaceDaily on any Web page published or hosted by SpaceDaily. Privacy Statement |
