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XMM-Newton is the biggest science satellite ever built in Europe. The collecting power of this telescope is the greatest ever launched to work at X-ray wavelengths. The total collecting mirror area is over 120 square metres spread across three individual X-ray telescopes.

Its acronym stands for X-ray Multi-Mirror design and also honours Sir Isaac Newton, the English physicist and mathematician (1642-1727) who advanced theories of gravitation and optics, built the first working reflecting telescope and discovered how to split light into its components to study its spectrum.

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