A spacecraft technician monitors NASA's Nuclear Spectroscopic Telescope Array during preparations to install on a Pegasus fairing separation ring.

In processing facility 1555 at Vandenberg Air Force Base in California, a spacecraft technician monitors NASA's Nuclear Spectroscopic Telescope Array (NuSTAR), suspended from the ceiling near its workstand, during preparations to install it on a Pegasus fairing separation ring.

A Pegasus XL rocket is being prepared to launch NuSTAR into space in March. Once processing of the rocket and spacecraft are completed at Vandenberg, they will be flown on the Orbital Sciences’ L-1011 carrier aircraft to the Ronald Reagan Ballistic Missile Defense Test Site at the Pacific Ocean’s Kwajalein Atoll for launch. NuSTAR, a high-energy x-ray telescope, will conduct a census for black holes, map radioactive material in young supernovae remnants, and study the origins of cosmic rays and the extreme physics around collapsed stars. For more information, visit http://www.nasa.gov/nustar. Photo credit: NASA/Randy Beaudoin, VAFB