X-rays stream off the sun in this image showing observations from by NASA's Nuclear Spectroscopic Telescope Array, or NuSTAR. (NASA/JPL-Caltech/GSFC)

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NASA scientists are excited over what they say is the most sensitive image of the sun ever taken.
The NuSTAR telescope – Nuclear Spectroscopic Telescope Array – normally turns its gaze on black holes and other farther objects in the solar system. But this time, scientists decided to turn its eye closer to home.
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The telescope managed to capture an image of the sun’s high-energy X-ray flashes — something never done before.
The sun has been too bright for other NASA telescopes, but NuSTAR, with its special design, is able to look at it without damaging its detectors.