May 8 2010 Sun’s Halo: Gift From God, End of Days, or Just Pretty? Actually, halos are an optical phenomenon that occur around the sun or the moon while there are very high cirrus clouds in the atmosphere. Rate this:Share this: Click to share on X (Opens in new window) X Click to share on Facebook (Opens in new window) Facebook Click to share on Reddit (Opens in new window) Reddit Like Loading... Related