It might seem like a simple question. But the science behind a blue sky isn't that easy. For starters, it involves something called the Rayleigh effect, or Rayleigh scattering. But that same ...

"Though the storm appears red to the human eye, in this ultraviolet image, it appears darker because high-altitude haze particles absorb light at these wavelengths," NASA wrote. "The reddish ...

Higher-energy photons in the ultraviolet (UV) range or beyond are required to interact with and excite electrons in these materials. Visible-light setups also struggle with spatial resolution ...