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(Nuclear Spectroscopic Telescope Array)
(space telescope for high-energy X-rays)

NuSTAR (Nuclear Spectroscopic Telescope Array) is a space-based X-ray telescope launched by NASA in 2012 aiming at a 2-year (minimum) mission to survey supermassive black holes. It remains active in 2019.

NuSTAR is a Wolter telescope, a telescope focusing the X-rays with grazing incident optics , i.e., reflecting only at small angles from the reflecting surface, which gives a much better X-ray signal-to-noise ratio. This contributes to its ability to sense higher energy X-rays than previous missions. It has a 10-meter focal length, using a 10-meter mast that unfolded with deployment.

NuSTARNuSTAR J100259+0220.5NuSTAR 

Referenced by:
Wolter telescope