Halos (Ἅλος) or Halus was a settlement in Ancient Greece, in the region of Phthiotis. It was destroyed by an earthquake and abandoned. ... Found on http://en.wikipedia.org/wiki/Halos
Rings or arcs that seem to encircle the sun or moon. They are caused by the refraction of light through the ice crystals in cirrus clouds. Found on http://ggweather.com/glossary.htm