This map shows the current location of the NuSTAR space telescope. NuSTAR (Nuclear Spectroscopic Telescope Array) is a NASA X-ray telescope studying high energy X-rays from deep space.
Technical stuff: NuSTAR uses a conical approximation to a Wolter telescope to focus high energy X-rays from astrophysical sources, especially for nuclear spectroscopy, and operates in the range of 3 to 79 keV.