![An Orbital Sciences technician completes final checks of NASA’s NuSTAR inside the Orbital processing facility before the Pegasus payload fairing is secured around it.](https://appel.nasa.gov/wp-content/uploads/2012/11/627674main_pia15411-43_full-670x380.jpg)
By Don Cohen NuSTAR, the Nuclear Spectroscopic Telescope Array, contains the first focusing telescopes designed to look at high-energy X-ray radiation on orbit. It is expected to contribute to a better understanding of collapsing stars and black holes.