The Nuclear Spectroscopic Telescope Array (NuSTAR)

The Nuclear Spectroscopic Telescope Array (NuSTAR) mission, launched on 13 June 2012, is the first focusing high-energy X-ray telescope in orbit. NuSTAR operates in the band from 3 -- 79 keV, extending the sensitivity of far beyond the ~10 keV high-energy cutoff achieved by all previous focusing X-ray satellites. The inherently low-background associated with concentrating the X-ray light enables NuSTAR to probe the hard X-ray sky with a more than one-hundred-fold improvement in sensitivity over the collimated or coded-mask instruments of previous missions operating in this bandpass. In this talk I will provide an overview of the mission, briefly discuss the in-flight performance, and present some science highlights from the first 18 months in orbit.