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The XMM-Newton (X-ray Multi-Mirror Mission - Newton) is an orbiting X-ray observatory launched by ESA in December 1999 on a Ariane 5 rocket. It is named in honor of Sir Isaac Newton.

Its mission is turned towards deep space and aimes to increasing our knowledge of very hot objects created when the Universe was very young, 

Originally known as the High Throughput X-ray Spectroscopy Mission it was placed in a very eccentric 48 hour elliptical orbit at 40°; at its apogee it is nearly 114,000 kilometres (71,000 mi) from Earth, while theperigee is only 7,000 kilometres (4,300 mi)

The satellite weighs 3,800 kilograms (8,400 lb), is 10 metres (33 ft) long and 16 metres (52 ft) in span with its solar arrays deployed. It holds three X-ray telescopes, developed by Media Lario of Italy, each of which contains 58 Wolter-type concentric mirrors. The combined collecting area is 4,300 cm². The three European Photon Imaging Cameras (EPIC) are sensitive over the energy range 0.2 keV to 12 keV. Other instruments onboard are two reflection grating spectrometers which are sensitive below ~2 keV, and a 30 centimetres (12 in) diameter Ritchey-Chretien optical/UV telescope.

The mission was proposed in 1984 and approved in 1985; a project team was formed in 1993 and development work began in 1996. The satellite was constructed and tested from March 1997 to September 1999. Launched in Dec 1999, in-orbit commissioning started Jan 2000. First images published Feb 2000. The original mission lifetime was two years, it has now been extended for further observations until at least 2010, and again until 2012, and technically could operate until 2018.

Observations are managed and archived at the European Space Astronomy Centre (formerly known as VILSPA) at Villafranca, Spain. The data are processed at the XMM-Newton Survey Science Centre at the University of Leicester, England.

The European satellite XMM-Newton (X-ray Multi Mirror), built under contract to ESA by a consortium of 35 European companies with Astrium as prime contractor, by far excels its predecessor, the Astrium-built ROSAT satellite.

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  • Lead Nation: Europe
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