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XMM-Newton

Space rocket
XMM-Newton, also known as the High Throughput X-ray Spectroscopy Mission and the X-ray Multi-Mirror Mission, is an X-ray space observatory launched by the European Space Agency in December 1999 on an Ariane 5 rocket. It is the second cornerstone... Wikipedia
Launch date: December 10, 1999
Cost: 689 million EUR (1999)
Manufacturer: Astrium
Speed on orbit: 4.145 miles/s
Perigee altitude: 5,662.7 km (3,518.6 mi)
Dimensions: Length: 10.8 m (35 ft); Span: 16.16 m (53 ft)
Collecting area: 0.4425 m2 (5 sq ft) at 1.5 keV; 0.1740 m2 (2 sq ft) at 8 keV