The Advanced X-Ray Astrophysics Facility (AXAF) is one of [[NASA]]'s ''Great Observatories''. It is an X-Ray telescope designed to perform astronomy from low [[Earth]] orbit.
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The '''Advanced X-Ray Astrophysics Facility''' (AXAF) is one of [[NASA]]'s ''Great Observatories''. It is an X-Ray telescope designed to perform astronomy from low [[Earth]] orbit.