XMM-Newton: Europe’s biggest space observatory
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 (ESA) in December 1999 on an Ariane 5 rocket.
It is the second cornerstone mission of ESA’s Horizon 2000 programme. Named after physicist and astronomer Sir ...
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