核光谱望远镜阵列（Nuclear Spectroscopic Telescope Array，NuSTAR）是一个已发射的沃尔特型X射线太空望远镜。观测的波段是来自天体的5到80keV之间的高能X射线，尤其是核光谱。这是 NASA 小探测工程计划中的第十一颗卫星（SMEX-11），并且它是能量超过钱德拉X射线天文台和XMM-牛顿卫星所观测波段中第一颗直接摄影的太空X射线望远镜。NuSTAR 原计划2012年3月21日发射，但因为发射载具的软件问题而延后。

核光谱望远镜数组的主要科学目标是深度探索质量超过太阳十亿倍的黑洞，并了解粒子在活动星系核如何被加速到光速的百分之几，以及研究超新星残骸以了解重元素如何在超新星中形成。

NuSTAR (Nuclear Spectroscopic Telescope Array) is a space-based X-ray telescope that 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. It is the eleventh mission of the NASA Small Explorer satellite program (SMEX-11) and the first space-based direct-imaging X-ray telescope at energies beyond those of the Chandra X-ray Observatory and XMM-Newton. It was successfully launched on 13 June 2012, having previously been delayed from 21 March due to software issues with the launch vehicle.