Rainbows form when a unique combination of meteorological and atmospheric conditions come together at the perfect time, and while folklore speaks of a pot of gold at the end, science reveals rainbows ...

Rainbows are one of nature's ... but also a symbol of hope and beauty. The 22° Halo is a striking optical phenomenon that manifests as a circular ring of light around the sun or moon.

Like rainbows, lunar halos form when light ... creates the lunar halo's characteristic circular shape. According to weather lore, a ring around the sun or moon means rain or snow is coming soon.

It was so rare and spectacular that even former Prime Minister Lee Hsien Loong shared photo of it. Read more at stomp.straitstimes.com ...