as well as Imperial College London and University College London suggest leveraging an optical phenomenon called chromatic aberration—that usually degrades image quality—to produce suitable ...

That's called a sun pillar. According to the National Weather Service, the optical phenomenon appears as a vertical shaft of light, visible most often at sunrise or sundown. SEE ALSO: Sunshine and ...

Source: Instagram Sun candle," as it has been described, recently appeared in the sky over Austria as part of a rare atmospheric phenomenon-a breathtaking, nearly unbelievable optical illusion.