The term 'Heavenly Circle' can be broken down into two crossword solutions: HALO (4 letters) and MERIDIAN (8 letters). HALO is a circle of light that is often depicted around the head of a holy figure, such as an angel or saint. It is also used to describe a ring of light around the moon or sun. MERIDIAN is an imaginary line that runs from the North Pole to the South Pole and is used to measure longitude. Together, these two words form the phrase 'Heavenly Circle, ' which is often used to describe the celestial sphere, or the sky as seen from Earth.