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Questions about the Chandra X-ray Obseravatory, the NASA satellite for X-ray astronomy.

The Chandra X-ray Observatory (CXO), previously known as the Advanced X-ray Astrophysics Facility (AXAF), was launched by on July 23, 1999.

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Chandra is one of the Great Observatories, along with the , Compton Gamma Ray Observatory (1991-2000), and the (2003-2020).

The telescope is named after the Nobel Prize-winning Indian-American astrophysicist Subrahmanyan Chandrasekhar. Its mission is similar to that of XMM-Newton spacecraft by .