NEW YORK -- A new view of the sun shows light that people can't see.
Scientists put together a composite photo using images from three telescopes.
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Combined, the photos could offer clues as to why the sun's outer atmosphere is at least 100 times hotter than the surface.
Astronomers think it could be due to nano-flares, which are small eruptions in the sun's atmosphere.
Nano-flares are too faint to stand out from the sun's brightness, but NASA's NuSTAR telescope can detect them.
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NuSTAR's data helps scientists monitor how frequently nano-flares happen.
That's important information to know since those events can affect the power grid, satellites, GPS, airlines, rockets, and astronauts in space.