A montage of images showing an artist's concept of NuSTAR (top); a color image of one of the galaxies targeted by NuSTAR (lower left); and artist's concept of a hidden black hole.
Top: An illustration of NASA’s Nuclear Spectroscopic Telescope Array, or NuSTAR, in orbit. The unique school bus-long mast allows NuSTAR to focus high energy X-rays.
Lower-left: A color image from NASA’s Hubble Space Telescope of one of the nine galaxies targeted by NuSTAR in search of hidden black holes.
Bottom-right: An artist’s illustration of a supermassive black hole, actively feasting on its surroundings. The central black hole is hidden from direct view by a thick layer of encircling gas and dust.
Image credits: Top: NASA/JPL-Caltech. Lower-left: Hubble Legacy Archive, NASA, ESA. Bottom-right: NASA/ESA